I don't see any pull-down menus or buttons on my e-mail screen to do this.
Sorry for replying after so long, but I seldom visit my Operamail webmail
page but I did today.
I think it's fairly obvious - in the 'Compose' page, just below the box
where you type your message, is a button labled "Switch to POWER editor"
if you are currently using the "Basic" (ie plain text) editor. Click
there to toggle to the alternative editor.
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-- Whiskers
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