WavePaint: how do you show a data transition that happens on a clock edge?

As far as I know there's no built-in edge arrow yet, at least I never found one when I went looking for the same thing last month while drawing up a QSPI write sequence. I ended up exporting to SVG and dropping a curved arrow in Inkscape, wich works fine since the diagram is just vectors at that point. The only downside is you have to redo the annotation if you change the timing later. If you keep the arrow purely cosmetic and only ever add it at the final draft stage, it's a minor annoyance. For a datasheet figure that's honestly the cleanest path. The other option is a freehand curve drawn directly in the tool if it has one now, but last I checked the drawing tools were mostly signal-oriented, so no arrows between arbitrary points.

For the labels bleeding into the next segment, I ran into the same thing when I was sketching out a simple counter circuit. Turned out I was dragging the end of one segment a little past where I meant to stop, so the new label started from the wrong spot. Zooming way in before clicking fixed it for me. Still fumbling around the interface though. Does the tool let you snap everthing to a fixed grid so the segment boundaries line up automatically, or do you just have to eyeball it?

Yeah the Inkscape route is what I landed on too. One thing that made it less painful: I save my arrow annotations as a separate SVG file that just sits on top of the exported diagram, so when the timing shifts I only regenerate the base drawing and the overlay mostly still lines up. Not perfect, you still nudge things if a transition moves, but way faster than redrawing arrows every time. I also started leaving a bit of empty horizontal space in the diagram where I know an arrow will go, which stops the overlay from landing on top of a signal trace.