Hello, Might be useful to have a "match properties" command - select the entity with the properties to be matched - layer, linetype, text style, color, whatever - then select the entities to match the selected entities.
"perpendicular snap" might be useful - select anywhere on the screen - to draw the perpendicular - just
select the line which is at any angle.
"measure" might be useful - select any line, arc or circle - then us "measure" to divide it into equal distances.
"isolate layer" - might be useful - select any object on any layer to turn off and/or freeze the remaining layers.
"le" line - endpoint might be useful - just type in le and begin drawing a line at an endpoint - "lc" line circle - "lm" line midpoint - "lt" line tangent - "lp" line perp - "ln" line near - or whatever abbreviations (2 keystroke) are not being used already....etc....etc...extremely useful....