[6.6 HelpHub]: Dimension controls overview

[jennydupuy]

Article: https://wordpress.org/documentation/article/dimension-controls-overview/

Update for 6.6

• Negative margins added for blocks with dimension controls (see 43243 for the list of concerned blocks)
• Allow negative values for margin controls 60347

General

• Make sure all screenshots are relevant to the latest version
• Make sure videos, if any, are up to date
• Add ALT tags for the images
• Make sure the headings are in sentence case
• Convert all reusable blocks to a ‘regular block’.
• Update the changelog at the end of the article

Notes

1. We are not adding detailed updates for the Block settings - Typography, Color, Layout, Dimension and Border and for the More Options setting in the block toolbar. Pls mention the settings included for the block and link to the detailed settings pages instead.
2. Some of the PRs have great videos that can be added to the article.

[github-actions]

Heads up @WordPress/docs-issues-coordinators, we have a new issue open. Time to use 'em labels.

[photuris5]

@Leonardus-Nugraha please assign this issue to me.