I've been suing the magnetic lasso tool to make a selection of a group of people; there is a lot of going between legs and over heads, etc. But invariably when I get about half way through the selection the magnetic lasson tool acts as if I've completed the selection, i.e. I tap the image and the point of the last tap suddenly is connected with my point of origin. I have done this several times, making sure that I didn't tap too hard or anything like that, but that seems not to be the problem (I'm using CS6/Mac 10.6.8, for what it's worth).
So, my question is: is there a way to erase part of the selection? I know about the add to/subtract from the selection; but that's not getting me back to where I need. For example, the line that cuts through my group, the line going from my end point to point of origin, well, if I can delete that line and continue on from the end point that might resolve this problem.
Any assistance/suggestions will be greatly appreciated.
You could simply reach the limit of allowed points in a path. You will have to use multiple passes/ segemnts. I don't see why this should be a problem. Selections are selections. The path is merely a temporary representation of the selection border, the actual selection is pixel based, no matter what. Maybe look up a tutorial on how to work with saved selections/ channels? Just saying... Seems to me like you're trying to outsmart the program and doing everything in one go, which arely ever works...
Had no idea I could "outsmart the program" or that I could even try to ... and none of the tutorials I've been using on Lynda.com have ever mentioned that there is a path limit when using the tool ... and none of the tutorials caution against trying to do "everything in one go".