You can choose your preferred snippets among the ones that are given. You can drag and drop the snippets to replace the current one or to add a new snippet. Here is how you can select the snippet.
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In the Navigation panel, go to Theme Flare -> Theme Configuration -> Manage Page Layout.
Click on the Design button of About Us page on the Action column. This will direct you to AboutUs page.
To add a Snippet you have to click on the Block icon present on the left side of the page. In this section, various blocks are present.
Within each block there are various snippets.
To apply a Snippet, just drag and drop your preferred snippet onto the place you want it to be placed.
After applying the snippet you can perform basic operations like Move, Delete and Edit.