Well it's easy to use, but some times a feel like it's a small child that doesn't want to listen. Parametric Sketching should allow for constraints to be kept but I think it limits you to just one.
You most likely will want to go to Tools > Environment and turn on
2D Arc Centers , no explanation required
2D Constraints , displays constraints for entities selected
Even if you see an L for Equal Length and a // for Parallel it will usually keep just one of them. Maybe PTC figured most people need the software to do their constraining and don't use the following intent manager shortcuts in draft.
(MB3) = Disable Constraint
(Shift+MB3) = Lock Constraint
(TAB) Select Current Constraint to Modify
These would be quite handy for creating Formats with out endless import export operations and unlinked sketches as it currently operates WF2.
The main thing that would be tested is knowing how to enable disable sketch preferences like Grid Snap, Angle, Horiz-Vertical and the Chain Sketching. All accessable through Sketch > Preferences and the Drawing Sketcher Icons.
It might also be handy to learn where the draft grid settings are. Which are in a separate and old Menu MGR location
View > Draft Grid.
I guess that PTC doesn't like having a drawing sketcher and model sketcher that are identical like in Solid Works.
just my $.04, I raised the price given inflation and poor programming of Drawing Sketcher
Michael