For what it's worth: "Previous command" was and remains - a super idea! It would be helpful to have a drop-down list with say the last 1-20 commands typed in, including function edits - and be able to choose one of those last n commands to run again. In addition to a Windows PC, I use a Microsoft Surface tablet and <right-double-clicking> a function name on that tablet is difficult if not impossible - so having a drop down list, including function edits would be very helpful.
As I mentioned in a previous forum post, I am open to helping on [non-APL and APL] programming tasks, but someone would best point me to generally, even theoretically, where in the voluminous code to start looking or working. Also, I wish the NARS2000 APL source code HTML page(s) had a "search code" or "search for keywords" feature.