* 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