Users can only edit measurements in the draft views they have created. Not in Base view (Siterecon Data).
When they click on any tool in Base view, a new draft view will automatically be created for them by the name 'Draft view X,’ where x is the number of new views.
You can edit only one layer at a time.
Just select the layer you want to edit on map or on layer panel.
Tools which are not applicable to any layer, based on its geometry, will be in disabled mode.
Selecting tools