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.

https://youtu.be/OnWpUYODE3g

• 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.