Good afternoon,

Following the query: QGIS 3.10 problem with merging layers & multipart promotion

I merged my layers into one piece. Now I would like to make them draggable across the map, as per my previous query here:

Moving layer across map canvas

I spotted, that despite the all-in-one performance, the draggable tool still moves only one layer selected:

enter image description here

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I want to have all of them moved at the same time. Is it possible?


I tried to use the " Remove duplicate geometries" option, although the result is still the same:

enter image description here

The similar question has been asked here:

How can I move two layers at once in QGIS?

but is not applied to the merged layers.

My attribute table looks as follows:

enter image description here

  • You merged your layers into one, but not your geometries. Have you tried dissolve or remove duplicate geometries? – Erik Jan 16 at 16:06
  • Dissolve isn't taken into account, as it moves my layer back into one piece. They must be merged as they stand now, but being draggable as one. – MKR Jan 16 at 16:31
  • The Move Feature tool has two options: "move feature(s)" and "copy and move feature(s)". Which one are you using? – csk Jan 16 at 18:47
  • I am isung only "move features". – MKR Jan 17 at 8:47

if you look at your attribute table, you will see if the two polygons were actually merged. if they are merged there will only be one feature, if not, you will see multiple features. If you want to move them all, select them all before using the move feature tool. If you actually want to merge them before moving, then select them all and use the merge selected featurestool.

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  • How can I recognize from the data attribute tabled, that my 2 polygons have been merged? Where can I find the "Merge selected features" tool in QGIS 3.10? – MKR Jan 16 at 17:27
  • if they are merged, there will only be a single feature in your attribute table, compared to 2. the merge slected features is located in the edit dropdown a the top left of your screen. – B-C B. Jan 16 at 17:38
  • They appear as a single feature, but I still can't move them as one – MKR Jan 17 at 9:04
  • I have updated this query, showing as my data attribute table looks like. There are 3 elements, which sources come from single layers. It's already been merged. – MKR Jan 17 at 9:40

It looks like I managed with it. Since our layers are merged, to make sure, that all of them are moved we must select from the main toolbar the "Select All features" option. Afterward, our merged polygons should appear as yellow. If this is so, you can use advanced digitalizing tools without a problem.

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  • that is the second part of my answer below... – B-C B. Jan 17 at 16:04

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