Add text:
Click text tool icon (large 'A' in toolbox)
Position cursor where you want text to start. Left-click, hold, and drag to define box. Release left-click.
Set text size etc as desired.
Type text
Getting out of the text box is convoluted.
There surely are other ways to do it, but this works:
Windows (top menu) > Dockable Dialogues > Layers
See the layers menu open (in right sidebar on my system)
Select the main drawing window.
Edit existing text:
Best guess from reading documentation and forums is that this is not possible in the normal sense of editing text.
You can of course delete and re-write text, or move pieces of it around like you would any graphic object in your drawing.
Vertical Text:
draw your text in standard text box, edit parameters as desired
(you can't change them after rotating)
select the text layer
open the rotate tool:
Tools --> Transform --> Rotate
- or - shift-R
enter angle or position values desired
click Rotate
click to a different layer (?)
Create Transparent Text:
from gimp forum: how to make a transparent background:
Select the area you want to make transparent. ...
In the Layer window (the one showing your image), select Layer – Transparency – Add Alpha Channel. If this is blanked out then it's already done.
Select Edit – Clear. ...
Save the file.
Lower the opacity of the text layer in the layers dock. (link to:) forum
make transparent text:
First, to aid in later adjusting position of text box, increase canvas size as above
and reposition drawing into the center.
Tools -> Text
click and drag to define size/location of text box
Click lower right corner of text dialog box
to select color, then click OK
Windows -> Dockable Dialog -> Fonts
select desired font
note the name is displayed in the text dialog box
Type desired text (click in text box if necessary)
drag to highlight and change font size if desired
press escape (twice?)
In far right menu bar,
select the new text layer that was created
click Opacity and scroll to desired
At this point it still seems to be floating...
Tools -> Rectangle select
drag around text block
Tools -> Move
dragging moves main image, not the block ???
but: Tools -> Rotate correctly rotates the text selection
click Rotate
Layer -> Anchor Layer