I'm trying to use the insert frame breaks in LyX. [allowframebreaks] before/after the frame title and \framebreak don't seem to work. I'm indeed using those two as TeX codes.
Thanks
[Tex/LaTex] Frame break in LyX
lyx
Related Solutions
In 2.1 there is an easier way. I really recommend reading the (brand new) Beamer LyX manual. Go to Help > Specific Manuals > Beamer Presentations
To change a normal frame to a fragile frame, put the cursor at the beginning of the frame (in the following screenshot, this means after the red text "Frame" and before the "Default Overlay Specifications").
Then change the environment from Frame to Frame (fragile) by going up the top left as shown here:
And clicking on FragileFrame
You should end up with
Hit Alt + PEnter (Edit -> Start new environment) or Alt + PShift+Enter (Edit -> Start new parent environment), depending on whether you are in an environment inside the frame or not.
These are shortcuts that insert a Separator environment and start a new frame.
This is described in Help --> Specific Manuals -> Beamer Presentations.
Best Answer
In LyX 2.1.x, put the cursor just to the right of "Frame" and go to Insert > Frame Options. In the box, type "allowframebreaks".
To see an example of that in action, go to File > New From Template > beamer-conference-ornate-20min.lyx (note that the frame is too small for it to have an effect, I believe, but just add some more text).