sampleline extend

[dreaminglisa3]

I want to extend sampleline along matchline for creating cross section view.

I used Modify-extend in hometab, but it doen't work.

What shall I do?

magenta color is matchline,

I attch screenshot.

[AlmasSuljevic]

You can only create sample lines along the alignment. If you want to extend sample lines you can grip-edit them. 

[troma]

You can click on the sample line and drag it longer.

Or you can start again.  Delete the old ones and make the new ones bigger.