V5 constraint sketcher, requires an 'enter' instruction via keyboard or mouse LHB click ( ending command) every time for a change to happen and if needing revision, a reselection of the dim again.
However, traditional sketcher allows the tab key use, which allows change upon change without ending command until a final 'enter' action. This is very convenient and fast with small incremental alterations to 'hone-in' a sketch shape without having to select the dim again. Allows better concentration on the task.