I have a similar question to this one: "snapping" polygons together
I have drawn let's say 3 areas. The 1. is overlapping with the 2. and the 2. is overlapping with the 3.
I made sure that I was using the snapping tool and the outer lines are matching each other. That is all fine. But now I want them to be just one feature. So I marked the 3 features and hit "Merge Selected Features". It seemed to work, but there is still the line between them.
Then I gave "Dissolve" a try but it had the same result.
So I played around but did not find any way to handle that. What I more would like to have would be that I can join points. IS there maybe something like merge points? Any ideas are welcome.
Here a picture with the vertical unwanted line: https://i.stack.imgur.com/gJmx4.jpg