Just by acident today, I projected some cut edges with the construction button already pressed, to my amazment they came thru as construction geometry, this also works with project geometry...
Everyone prob already knows but this was new to me. My old workflow was to create a new sketch, project cut edges, select them all and turn them into construction geometry, fine if you havnt already got geometry there you want to keep as solid. just thiught i would share
I have the construction toggle on a keyboard shortcut ( - ) and use it frequently while sketching. I'm also finding the marking menu button for the same function (straight to the right while in sketch mode) to be useful.