How do you delete horizontal arrangement so fast?

MIT App Inventor Help
1

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how to delete horizontal arrangment so fast

2

Hello,
Can you explain with more details what do you want to achieve?

3

I want to delete many things at once not one by one

4

As far as I know, you can't select multiple arrangements to delete. Anyway, you should take a look at some extension to create those elements dynamically:

[Free] CompCreator - create component dynamically - Extensions - MIT App Inventor Community