I am new to QGIS and have done some research on this topic before posting but not sure I found an answer.
I have one feature that has multiple polygons (islands of a nation). In reality, there is only one island, but my file has split the island into two polygons. I have turned on editing mode and selected the nodes of the one island and moved the polygon so it is adjacent to the other polygon, but now I have a line down the middle.
Is there a way either merge the polygon into one, or remove the line down the middle or some other way of accomplishing this?