PlotToggle - From the Project tab

I hope this helps others, it has been very useful for me:

I added plot toggle controls to the object list in the Project tab. It makes it easier and quicker to show or hide objects.

As always, let me know if clean-up, changes, corrections are needed, I'm happy to help.

• Can control plot toggle from project tab. Need to drive project tab state from changes in Selected tab.

• Synchronize the state of the plot checkboxes to the state of the settings.