When entering any element using a sketch or a sketch line, the program can detect whether the same element has already been entered in the same position.
If so, the colour in which the duplicate element is drawn when it is entered changes from black at the edges and green at the ends to red at all edges and ends. It also prevents users from selecting sketch elements to then transform them.
This improvement has been added to prevent users from inadvertently or mistakenly entering duplicate sketch elements.
