Text Rephraser

The text rephraser is a great tool for when I want to generate alternative content. However, it would be usefull to have the tool apply to the current written content. For example, in the picture provided, the rephrased content has drop downs to change words to further customise or improve the content. This is a great tool and option. However, I would like the tool to provide drop downs to suggest synnonyms in the EXISTING content, and not have to rephrase the whole sentence/paragraph. This would be useful as my sentence might have key words in it that I do not wish to lose but still improve the content with suggestions. Thank you