Feature Requests: Shifting starting point of path and/or crack marker

[lgsmith295]

First, thank you again for this contribution to the dendro community! I am really excited about it.

Due to common imperfections in wood samples (breaks/cracks in the sample, insect damage, branch scars, etc), the ability to shift the path of measurements to a different location on the image (while keeping it continuous) would be really helpful.

Here is a link to the description of this feature in coo recorder: http://www.cybis.se/forfun/dendro/helpcoorecorder7/meacrack/index.htm

In some cases, the user may want to be able to measure across the break/crack and subtract that value from the ring width. It seems like it could be done manually, but a "crack marker" feature might be nice to see eventually.

Apologies if either of these operations are already possible and I missed them in the documentation.

[JingningShi]

My apologies for the late reply. I was doing fieldwork this week. Thanks for the great suggestions! I will try my best to add these features in the new version 😊