Explanation
The column you should use in the Layer Properties Manager to prevent a layer from being displayed in the active viewport only is "VP Freeze". The VP Freeze column allows you to control the visibility of layers in specific viewports. When you freeze a layer in the VP Freeze column, it is only hidden in the active viewport and remains visible in other viewports. On the other hand, when you freeze a layer with the Freeze column, it becomes hidden in all viewports. Therefore, VP Freeze is the column you should use to hide a layer in a specific viewport only.
https://help.autodesk.com/cloudhelp/2015/ENU/AutoCAD-LT/files/GUID-B297EBD9-D68C-47E1-87CE-1B37

* Select the Car Block:
* In the current drawing, select the car block.
* Copy with Base Point:
* Right-click and choose "Clipboard" > "Copy with Base Point".
* Specify the lower left-hand corner of the garage as the base point.
* Switch to the Target Drawing:
* Open the target drawing where you want to paste the car block.
* Paste to Original Coordinates:
* Right-click and choose "Clipboard" > "Paste to Original Coordinates".
* The car block will be pasted into the same position relative to the garage as in the original drawing.
References:
* AutoCAD User Guide on Clipboard Operations
* Autodesk Knowledge Network: Copying and Pasting Objects in AutoCAD

* Inspect the Dimension Properties:
* Double-click on the first dimension to open the text editor. Notice the dark solid color background behind the dimension text.
* This indicates that a background mask is enabled for this dimension.
* Check the Background Mask Settings:
* Select the dimension and go to the Properties palette.
* Under the 'Text' section, find the 'Fill Color' or 'Background Mask' setting. Ensure it is set to an appropriate color (e.g., the same as the background).
* Compare with the Second Dimension:
* Double-click on the second dimension and observe the absence of a background color during editing.
* In the Properties palette, confirm that the 'Background Mask' is either disabled or set to 'None.'
* Adjust Settings if Needed:
* If you want both dimensions to have a background mask, enable the 'Background Mask' for the second dimension and choose the desired color.
References:
* AutoCAD Documentation on dimension styles and background masks: Dimension Styles

Explanation
match properties is a command that allows you to apply the properties of one object to another object. You can use this command to change the layer of an object by selecting an object on the desired layer as a source.
To use this command, you can either:
* Click on the Match Properties icon in the Properties panel of the Home tab.
* Type MATCHPROP at the command prompt and press Enter.
Then, you can follow these steps:
* Select an object on the same layer as the circle as a source object and press Enter.
* Select the polygon and the rectangle as destination objects and press Enter.
Now you have placed the polygon and the rectangle on the same layer as the circle.

the command that should be used to create a new drawing file from selected objects is WBLOCK. This command allows you to export a group of objects as a drawing, which can be inserted into other drawings as a block2.