Hello. Thank you for your response. My query was more to do with the %%cf_custom-field-name%% snippet which I’m using to auto-populate my meta descriptions. This takes the description of the custom post and uses it for the meta description field. The only problem is that these descriptions are around 300-500 words long, and I need them to be shortened. I wondered if there was a way to do this, so that Yoast automatically trims the (%%cf_custom-field-name%%) meta description down to a sensible number of characters, just like it does when you use %%excerpt%% ?