How to Make Maps Using Mapping Software (QGIS)

[Krago]

Sorry to revive this thread, but I need some help.

I have spent many happy years making political maps on MapInfo.  Now I'm trying to learn QGIS, and I'm ready to pull my (remaining) hair out!

Here's a simple task that I can do in less than a minute in MapInfo, but I can't figure out how to do in QGIS after hours of Googling.

I want to split a polygon in Layer A using a polygon in Layer B.

In MapInfo, I make Layer A editable, select the polygon(s) on Layer A, and click on SPATIAL > Set Target.  I then select the polygon(s) on Layer B, click on SPATIAL > Split > Split Target, select the values on 'Data Disaggregation', and click OK.

What the hell do you do in QGIS?

[Krago]

Thanks for replying so quickly.

I tried using Intersection, but it seems to create a temporary layer.  I actually want to split the polygon in Layer A.

Where do I find the 'Split by Line' tool?

[Krago]

Hi again.

I don't want to save it as a temporary or permanent file.  I want to split a polygon in Layer A and save the two pieces in Layer A.

[Krago]

It works.  Thank you.