Pat Hawks

dirtysuds

Once activated, Gallery posts will have an excerpt that is a row of thumbnail images from that post, rather than some (often not descriptive) text. 
This excerpt should appear in your archive pages, and perhaps elsewhere, depending on your theme.
Note: The post must actually have the post type ‘Gallery’. It cannot just be a post with a gallery in it.

Gallery Excerpt

Replace the excerpt for posts with the post type 'Gallery' to a row of images from the post.

Bhavin Thummar

This plugin gives the facility for hiding and showing the admin menu of the side and top bars.
This plugin gives an easy way to hide admin menus by checking the checkbox of a particular menu in the form and then submitting the form so that checked menus hide from the admin.
Admin also can hide menu according to the role of users.
<iframe loading="lazy" class="youtube-player" width="560" height="315" src="https://www.youtube.com/embed/LiXcE6aEvdI?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

Hide Admin Menu

Working FIne

Using this plugin, we can hide the admin menu easily.

Gallery Excerpt vs Hide Admin Menu