I'm after some tips on what photo or other editing tools people use to "Mark Up" screen grabs, mainly waveforms?
Ideally would like to be able to:
1. Add rulers, or at least a distance marker (line with bars on the end) ie to show a "complete cycle" etc
2. Add text and call outs
3. Be good to be able to highlight areas, so if a photo of suspension to show the detail of the problem?
I've been playing with Visio, while it can do the Job, It's not cheap and might be considered a sledge hammer for the proverbial nut! So does anyone have any simple, ideally free, options they are happy with?