If you want to hide a structure box in plan view, just follow the steps below.
Step 1: Click the 'Edit' button in the 'Structures' section of the Lineardraft toolbar
This will open the structure selection window.
Step 2: Click on the structure you want to hide and click 'Edit'
Alternatively, you can select your structure from the drop-down menu. Clicking 'Edit' will open the 'Edit Structure' window.
Step 3: Click on the 'Settings' tab
Step 4: Click the sections of the structure box you would like hidden
If it is highlighted in blue, this indicates it is currently visible in plan view.
Step 5: Click 'Update Structure'
A loading screen will display and once the changes have been applied the window will close.