Thanks! That particular button ("4th in, on bottom..'simple' text editor") seems to affect the whole paragraph, not just the first line of a paragraph. Therefore does not create a simple, classical first-line indent. But it is indeed very useful for the purpose of indenting a whole paragraph.
Depending on the theme in use, you'd have to find the main.css file and add the following to the section's declaration; something like
This will retroactively indent every paragraph, and keep future paragraphs indented without further action.
You could also affect the block's 'Design' by adding the text-indent line to the 'Additional CSS' control in the 'CSS' tab of the 'Set Block Styles' modal. It'll only affect the first line of the Content block.
Let me know if you need help making the change.
#full-content-sidebar { text-indent:50px; /* other stuff */ }
This will retroactively indent every paragraph, and keep future paragraphs indented without further action.
You could also affect the block's 'Design' by adding the text-indent line to the 'Additional CSS' control in the 'CSS' tab of the 'Set Block Styles' modal. It'll only affect the first line of the Content block.
Let me know if you need help making the change.
Fourth button in on bottom row of 'simple' text editor.