How to add multiple stickies to an Index Card/Substorm

Use the Shift key on your keyboard to select and move multiple sticky notes at once.

Picking up multiple stickies with right-click

Your Guide to Using Index Cards and Substorms — Stormboard

Gather sticky notes in Lucidspark – Lucid

Next-gen digital whiteboards: 7 shared canvas apps for visual collaboration

How do I create a Group of sticky notes?

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TRU RED 4 x 6 Index Cards, Lined, White, 50 Cards/Pack, 3 Packs (TR51007) : Office Products

Can I select multiple stickies at once?

Picking up multiple stickies with right-click

How to Use Stickies on Mac: 12 Steps (with Pictures) - wikiHow

Your Guide to Using Index Cards and Substorms — Stormboard