How do I accept yellow suggested text when typing in writer?

When typing in writer, I noticed that from time to time a yellow box pops up, above and to the right of my cursor, apparently suggesting the spelling of a word it thinks I am typing.

For example, after I type Capital Con the screen looks like this suggesting the word “Contributions”:

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How do I accept this suggested yellow text?

That’s the “word completion” feature and you just need to press Enter to accept the suggestion. You can change which key to use in Tools → AutoCorrect → AutoCorrect Options → Word Completion tab.