If you want to change font size etc for several text objects in one go, no, there is no way. With "Properties" you always can edit a single entity only. With "Attributes" you can edit several entities, but it doesn't cover detailed aspects of text.
Text attributes cannot be set as a property of a layer.
Thanks for the reply, not what I wanted to hear :) Perhaps a reason not to use LibreCAD. How do others work around this problem? Perhaps its only really a problem with Electrical drawings where you have a lot of text fields?
Would it perhaps be possible using the command line?
I seem to remember there is a way to read multiple commands from a text file. Could one get a list of all text fields selected for example and use that to create multiple commands to change font in each?