How do I move multiple sectors and things down?

[mikenet2007]

I'm wanting to move an entire area of the map down by 3645. The area has about 100 sectors, and 20 things, which need to keep the same height relative to the other sectors I'll be moving down. Doing this one sector at a time will take a long time, I was just hoping you can highlight an area and bring it all down by a certain value while keeping the sector heights and properties intact.

I'm using gzdoom builder.

[Kappes Buur]

Highlight all sectors, then in the edit window select floor height and type in --3645.

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The opposite (++) also works to raise selected sectors.

[mikenet2007]

This saved me a lot of time, I was in the process of doing it by selecting all the ceilings and floors in 3d mode and mouse wheeling down. But that boged down the computer moving that many surfaces in 3d mode. I figure I would have been sitting there until 1:00 doing that.

[Kappes Buur]

Just for general information:

While the subject of selecting multiple sectors came up, there is also a feature build into GZDoom Builder
which makes working with multiple sectors really easy, when they have to be worked on at different times.

For example, highlight a few sectors, then press Ctrl+1.
Press C to clear the selection.
Now press 1 and those sectors are highlighted again.
Pressing Ctrl+Shift+1 will clear that group of selected sectors.

This works for any entity, such as sectors, things, linedefs.

In this way up to 10 groups can be recalled.
But only for that editing session. Closing the map will clear the selections.

[edit]
As of r1981, group selections are saved, to be used again in further editing sessions.

[mikenet2007]

I can see that being helpful too with as much designing I'm doing right now.