In today’s fast-paced design world, AutoCAD users often find themselves working with a multitude of images and drawings. To streamline the workflow and enhance the aesthetics of your projects, it is essential to master the technique of sending images to the background. This powerful feature allows you to seamlessly integrate images into your AutoCAD drawings, creating a more visually appealing and professional presentation.
Sending images to the background in AutoCAD 2018 is a straightforward process that yields impressive results. By following a few simple steps, you can effortlessly import an image into your drawing and assign it a background status. This technique is particularly useful for adding logos, background textures, or reference images to your designs. It enables you to maintain the clarity and visibility of your primary drawing elements while providing additional context or visual interest.
Once an image is sent to the background, it becomes an integral part of your drawing, but it no longer obstructs the main geometry. You can freely manipulate the image’s position, scale, and transparency to achieve the desired effect. This flexibility allows you to fine-tune the image’s placement and adjust its prominence to complement the overall composition of your drawing. By sending images to the background, you unlock a vast array of possibilities for enhancing the visual appeal and functionality of your AutoCAD projects.
How to Import an Image into AutoCAD
Importing an image into AutoCAD allows you to overlay an image onto your drawing, providing a visual reference or background for your design. Here’s a step-by-step guide to help you import an image:
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Choose the Image File: In the AutoCAD interface, click the "Insert" tab. Select "Raster Image" from the menu.
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Locate and Select the Image: A file browser window will appear. Navigate to the folder where your image is located. Select the image file you want to import and click "Open."
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Specify Insertion Point: AutoCAD will prompt you to specify the insertion point for the image. This is the point on the drawing where the corner of the image will be placed. Click on the desired insertion point in your drawing.
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Set Image Scale and Rotation: After the image is inserted, you can adjust its scale and rotation if needed. Right-click on the image and select "Properties." In the "Properties" dialog box, use the "Scale" and "Rotation" fields to adjust the image’s dimensions and orientation.
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Set Image Transparency: You can also control the transparency of the image. In the "Properties" dialog box, find the "Transparency" section. Adjust the "Transparency" slider to control the visibility of the image. A value of 0% will make the image fully opaque, while a value of 100% will make it fully transparent.
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Edit Image Properties: The "Properties" dialog box also allows you to edit other image properties, such as brightness, contrast, and color balance. Use the sliders and options in the "Appearance" section to adjust the image’s appearance as desired.
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Snap to Image: You can snap to points on the imported image to facilitate accurate object placement. To enable image snapping, click the "Snap" tab in the AutoCAD interface and select "Image." This will allow you to snap to the edges, corners, and other points of interest on the imported image.
Placement and Positioning
Placement
To insert an image into your AutoCAD drawing, you can use the “Image Insert” command. This command can be accessed by typing “IMAGE” into the command line or by clicking on the “Image” button in the ribbon.
When you insert an image, you will need to specify the location where you want the image to be placed. You can do this by clicking on the desired location in the drawing window or by entering the coordinates of the location in the “Insertion point” field.
Positioning
Once you have placed the image, you can position it using the grips that appear around the image. The grips allow you to move, rotate, scale, and shear the image.
To move the image, click on the move grip (the blue square) and drag the image to the desired location. To rotate the image, click on the rotate grip (the green circle) and drag the grip around the image. To scale the image, click on the scale grip (the red square) and drag the grip outward or inward to increase or decrease the size of the image. To shear the image, click on the shear grip (the yellow square) and drag the grip up or down to shear the image.
In addition to using the grips, you can also position the image using the “Properties” dialog box. The “Properties” dialog box can be accessed by right-clicking on the image and selecting “Properties” from the context menu.
The “Properties” dialog box contains a number of options that allow you to control the placement and positioning of the image.
| Property | Description |
|---|---|
| Insertion point | The location where the image is inserted. |
| Rotation | The angle at which the image is rotated. |
| Scale | The size of the image. |
| Shear | The amount of shear applied to the image. |
Scaling and Resizing
Scaling and resizing an image in AutoCAD is a simple process that can be done in a few steps. First, select the image you want to scale or resize. Then, click on the “Scale” or “Resize” command in the “Edit” menu. A dialog box will appear, allowing you to enter new dimensions for the image. You can also use the handles around the image to scale or resize it directly.
When scaling an image, you can specify the new width and height in pixels, inches, or millimeters. You can also choose to scale the image proportionally, which will maintain the original aspect ratio of the image.
When resizing an image, you can specify the new width and height in pixels, inches, ormillimeters. You can also choose to constrain the proportions of the image, which will prevent it from being distorted.
The following table summarizes the different options for scaling and resizing an image in AutoCAD:
| Option | Description |
|---|---|
| Scale | Scales the image by a specified factor. |
| Resize | Changes the size of the image to specific dimensions. |
| Constrain Proportions | Prevents the image from being distorted when resizing. |
Transparency and Opacity
Transparency controls the visibility of an image in AutoCAD. Transparent pixels in an image allow objects behind them to show through, creating the illusion of layering. Opacity is a measure of transparency, with 0% being completely opaque (not transparent) and 100% being completely transparent (invisible).
Setting Transparency and Opacity
In AutoCAD, you can control the transparency and opacity of images in the Image Manager. To access the Image Manager, click the “Insert” tab on the ribbon and select “Image”. In the Image Manager window, select the image you want to modify and click the “Edit” button.
Transparency Options
The Transparency options in the Image Manager allow you to select how transparent an image will be. You can choose from the following options:
- None: No transparency. The image will be completely opaque (0% transparent).
- Additive: The image will be transparent to objects behind it, but will not allow objects in front of it to show through.
- Subtractive: The image will be transparent to both objects behind it and objects in front of it.
Opacity Levels
The Opacity slider in the Image Manager allows you to specify the level of transparency for the selected image. The opacity value is expressed as a percentage, with 0% being completely opaque and 100% being completely transparent. Note that the exact behavior of transparency and opacity may vary depending on the image file format and the display settings of your computer.
| Transparency | Opacity |
|---|---|
| None | 0% |
| Additive | Typically between 20-80% |
| Subtractive | Typically between 50-100% |
Linking vs. Embedding
When you add an image to AutoCAD, you have the option to link or embed it. Linking creates a reference to the original image file, while embedding copies the image data into the AutoCAD drawing file.
Linked Images:
- Pros:
- Easier to update the image by modifying the original file.
- Smaller file size for the AutoCAD drawing.
- Cons:
- The original image file must be available for the image to display correctly.
- If the image file is moved or deleted, the image will no longer display in AutoCAD.
Embedded Images:
- Pros:
- The image is always available in the AutoCAD drawing, regardless of the availability of the original file.
- The image data is protected from accidental deletion or modification.
- Cons:
- Larger file size for the AutoCAD drawing.
- More difficult to update the image.
Advantages and Disadvantages of Linking and Embedding
| Feature | Linked | Embedded |
|---|---|---|
| File Size | Smaller | Larger |
| Image Update | Easy | Difficult |
| Image Availability | Dependent on original file | Always available |
| Protection from Modification | Vulnerable | Protected |
Recommendation:
For most situations, linking an image is recommended. This allows for easier image updates and a smaller file size. However, if you need to ensure that the image is always available in the AutoCAD drawing, embedding is the better option.
File Formats and Compatibility
AutoCAD 2018 supports a wide range of image file formats, allowing users to import and insert images into their drawings. The supported formats include:
| File Format | Description |
|---|---|
| BMP (Bitmap) | Raster image format with support for various color depths |
| GIF (Graphics Interchange Format) | Raster image format with support for indexed colors |
| JPEG (Joint Photographic Experts Group) | Raster image format with lossy compression |
| PNG (Portable Network Graphics) | Raster image format with support for transparent backgrounds |
| TIFF (Tagged Image File Format) | Raster image format with support for various color models |
| DWG (AutoCAD Drawing) | Proprietary AutoCAD file format used to save drawings |
When inserting an image into AutoCAD 2018, it is important to consider its resolution and size. The resolution of an image refers to the number of pixels per unit area, and a higher resolution image will result in a sharper and more detailed appearance. However, a higher resolution image will also be larger in file size.
The size of an image refers to its dimensions in terms of width and height. A larger image will take up more space in the drawing and may require more computational resources to process. Therefore, it is recommended to use images that are no larger than necessary for the desired purpose.
By considering the resolution and size of an image, users can optimize their AutoCAD drawings for performance and appearance.
Image Quality and Resolution
Image Quality
The quality of an image refers to its clarity, sharpness, and the accuracy of its colors. High-quality images are essential for creating professional-looking drawings and presentations. The image quality is determined by the number of pixels in the image, the file format, and the compression level.
Resolution
The resolution of an image refers to the number of pixels per unit of length. Higher resolution images have more pixels and are therefore more detailed and clear. The resolution is measured in pixels per inch (ppi) or pixels per centimeter (ppc). The typical resolution for printed images is 300 ppi, while the typical resolution for web images is 72 ppi.
Factors Affecting Image Quality and Resolution
The following factors can affect the quality and resolution of an image:
| Factor | Effect |
|---|---|
| Image size | Larger images have more pixels and are therefore more detailed. |
| File format | Lossless file formats, such as PNG and TIFF, preserve the original quality of the image, while lossy file formats, such as JPEG, compress the image and reduce its quality. |
| Compression level | Higher compression levels reduce the file size but also reduce the image quality. |
| Resampling | Resampling an image changes its resolution. Upsampling an image (increasing its resolution) can make it blurry, while downsampling an image (decreasing its resolution) can make it pixelated. |
Tips for Optimizing Image Quality and Resolution
To optimize the quality and resolution of your images, follow these tips:
- Choose an image with the appropriate size and resolution for your needs.
- Save the image in a lossless file format, such as PNG or TIFF.
- Use a low compression level to preserve the image quality.
- Resample the image only when necessary and avoid upsampling.
Alignment and Snapping
Alignment
Alignment tools help you accurately position objects relative to each other or to the drawing’s axes. You can use alignment options to snap objects to specific points or to align them horizontally, vertically, or along other angles.
Centre Object
The Centre Object option allows you to centre one object within another or to align multiple objects around their centres.
Snapping
Snapping restricts the movement of objects to specific points or intervals. This helps you maintain precise distances and angles while drawing or editing.
Relative Snap
Relative Snap enables you to snap to points relative to the current object, such as its endpoints, midpoints, or grid intersections.
Intersection Snap
Intersection Snap allows you to snap to the intersection points where multiple objects intersect.
Midpoint Snap
Midpoint Snap lets you snap to the midpoint of lines, arcs, or circles.
Perpendicular Snap
Perpendicular Snap helps you create perpendicular lines or objects relative to existing ones.
Polar Snap
Polar Snap enables you to snap to points along a specified angle, allowing for precise object alignment.
Tangent Snap
Tangent Snap allows you to snap to tangent points on circles or ellipses, creating tangential lines or arcs.
Centring Snap
Centring Snap lets you snap to the centre of circles or arcs when creating lines or other objects passing through their centres.
Cropping and Trimming
Image cropping and trimming are essential techniques for adjusting the size and composition of an image in AutoCAD. Here’s a detailed guide to perform these tasks:
Image Cropping
Cropping an image involves removing unwanted areas from the edges of the image. To crop an image, follow these steps:
- Select the image you want to crop.
- Click on the “Crop” icon from the Image tab.
- Adjust the crop handles to define the new boundaries of the image.
- Click “Enter” to confirm the crop.
Image Trimming
Trimming an image removes excess white space around the perimeter of the image. To trim an image, follow these steps:
- Select the image you want to trim.
- Click on the “Trim” icon from the Image tab.
- AutoCAD automatically trims the image, removing excess white space.
Advanced Cropping and Trimming
AutoCAD also offers advanced cropping and trimming options, providing greater control over the process:
- Custom Crop: Allows you to manually define the cropping area with coordinates or by dragging a selection rectangle.
- Aspect Ratio: Locks the aspect ratio of the cropped image, preserving the original proportions.
- Mirror Crop: Flips the cropped image horizontally or vertically.
- Rotate Crop: Rotates the cropped image by a specified angle.
- Trim Selection: Trims only the selected portion of the image.
- Trim to Object: Trims the image to fit inside a specified object.
- Trim to Window: Trims the image to fit within a rectangular window.
- Trim to Paper Space: Trims the image to the size of the paper space.
- Trim to Saved Clipping: Trims the image to the boundaries of a previously saved clipping.
| Option | Description |
|---|---|
| Custom Crop | Manual definition of cropping area. |
| Aspect Ratio | Preserves the original image proportions. |
| Mirror Crop | Flips the image horizontally or vertically. |
| Rotate Crop | Rotates the cropped image. |
| Trim Selection | Trims the selected portion. |
| Trim to Object | Trims to fit within an object. |
| Trim to Window | Trims to fit within a window. |
| Trim to Paper Space | Trims to the paper space size. |
| Trim to Saved Clipping | Trims to a saved clipping boundary. |
Layer Management
Layers serve as a crucial tool in AutoCAD for organizing and managing drawing elements. Here’s a detailed guide to layer management in AutoCAD 2018:
1. The Layer Manager Toolbar
Access the Layer Manager’s features conveniently from the Layer Manager toolbar. It offers quick actions such as adding, deleting, or freezing layers.
2. Create a New Layer
To add a new layer, click the “New Layer” button in the Layer Manager or enter “LAYER” in the command line followed by “Create”.
3. Rename Layers
Right-click on a layer in the Layer Manager and select “Rename” to change its name. This allows for easier identification and organization.
4. Freeze and Thaw Layers
Freezing a layer hides it from the drawing area but preserves its data. Thawing restores visibility. Use the light bulb icon in the Layer Manager or the “LAYFRZ” command to freeze or thaw layers.
5. Lock Layers
Locking a layer prevents modifications to the objects on it. Click the lock icon in the Layer Manager or enter “LAYER” followed by “Lock” to lock a layer.
6. Set Layer Colors and Linetypes
Assign unique colors and linetypes to layers for visual distinction. Right-click on a layer and select “Properties” to access these settings.
7. Import and Export Layers
Share layer configurations across drawings by exporting layers as a .lyr file and importing them into other drawings.
8. Layer States
Set up different combinations of layers’ visibility, freezing, and locking using layer states. This allows for quick switching between different working views.
9. Layer Properties Manager
The Layer Properties Manager provides advanced settings for layers, including controlling their plotting style, annotation scale, and visibility on different viewports.
10. Advanced Layer Control Techniques
Explore advanced techniques such as setting layer priorities, using layer filters, and leveraging the Layer Translator to automate layer management tasks. These techniques enhance productivity and drawing accuracy.
2018 AutoCAD: How to Send Image in Background
AutoCAD 2018 provides a user-friendly interface and powerful tools to create, edit, and manage technical drawings. One of its features is the ability to send images to the background of your drawing. This can be useful for adding visual reference information or for creating a custom background for your drawing.
To send an image to the background in AutoCAD 2018, follow these steps:
1. Open the drawing that you want to add the image to.
2. Click the “Image” tab on the ribbon.
3. Click the “Attach” button in the “Insert Image” panel.
4. Select the image file that you want to insert.
5. In the “Insert Image” dialog box, select the “Send to Background” option.
6. Click the “OK” button.
The image will be inserted into the drawing and will be sent to the background. You can move and resize the image as needed.
People Also Ask
How do I move an image in the background in AutoCAD 2018?
To move an image in the background in AutoCAD 2018, select the image and then use the arrow keys to move it in the desired direction.
How do I resize an image in the background in AutoCAD 2018?
To resize an image in the background in AutoCAD 2018, select the image and then use the Scale command (shortcut: SC).
How do I delete an image in the background in AutoCAD 2018?
To delete an image in the background in AutoCAD 2018, select the image and then press the Delete key.
