If you have used the Project Trace Image tool to import a plan into your project, you can hide the image if you want using the View Filter. This is an alternative to deleting the image.
To filter project trace images from view:
Select View
> View Filter or click the View Filter button on the Basic View
Control or Advanced View Control toolbar.
In the View Filter dialog, select the Notation tab.
In the Project Trace Images row, click the eye icon in the Display column to turn project trace images on or off.
Project trace image is turned on
Project trace image is turned
off
Click OK.