CAPS lock does not work

[SheetLightning]

Thank you for making this emulator public. I have been trying to type in caps like one usually does with BASIC programs but the only way to do this is to hold down the SHIFT key. When CAPS LOCK is on, the emulator continues to display lower case characters. It does work with either upper or lower case so I guess its no big deal.

I have found that deleting characters is a bit tricky. For example, although Backspace moves the cursor back over the previous character, it does not allow one to overtype that character. Delete does delete the preceding character but leaves a block character in its place. Once can overtype but one can't see the character that is being typed over the block. Is this meant to emulate the Tektronix behaviour whereby the screen cannot be erased except by the Page command? I have not yet experienced how a real Tek works in this regard. Still, BASIC seems to work very well. Thank you.