What it does
Revision clouds that carry their note. Cloud the change and type what changed in one action, so the note travels with the cloud instead of sitting in a separate email.
Real dimensions. Calibrate once against a known length on the drawing and every dimension you draw afterwards reads out in millimetres or metres. Or switch measuring off and type your own figures.
Numbered comments with a schedule. Drop numbered pins, write the comment against each one, mark them open or closed, then export the whole list as a comment schedule to send back to the design team.
Zones, callouts and stamps. Shade areas in transparent red, green, blue or orange. Add leader callouts. Apply approval stamps carrying your name and the date.
Markup that stays editable. Save the job and every annotation can be moved, re-worded or deleted later — it is not burned into a flat image. Export a flattened PNG, JPEG or PDF when you are ready to issue it.
Why editable markup matters
Most annotation tools flatten your comments into the image the moment you save. That is fine until a drawing comes back at revision C and half your comments still apply. Clarity Markup keeps every cloud, dimension and comment as a separate object, so you can carry the ones that still stand onto the new drawing rather than redrawing them.
Windows 10 or 11, 64-bit. Installs for the current user, so no administrator password is needed. About 2 MB to download.