On 02/09/2018 01:13 PM, Patrick Dupre wrote:
Can I do this with beamer:

on the same slide:

1)
Display item 1 only
2)
display item 2 (actually a file) only
3)
Display only items 1 and 3 like the item 2 has never been shown


You are looking for the "only" environment. I am attaching a minimal example.

Attachment: only.lyx
Description: application/lyx

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