[Feature] it will be better to show the area size or pixel coordinate

[junxnone]

Thanks for your share.

Is your feature request related to a problem? Please describe.
When I label or check the small object , I want to see if this is the limit of my algo

Describe the solution you'd like

• show the area size/width/height after the bbox or polygon...
• show the pixel coordinate of the image dynamically with mouse pointer