How to transfer an image from different PCs to a TV?

Question

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There are several jobs (so far 3, but with a possible increase), at which managers sit and receive clients. There is a TV next to it, on which everything is shown: videos, on-air TV, etc. All devices, including the TV, are on the local network.
It is required that at any time, one of the managers could broadcast his monitor to a TV (so that the client could see the product, description, etc.). Then, another manager could do the same. And then, the TV would again show, for example, terrestrial TV.
What software or hardware can solve this problem?

Answer 1

svg take everything that is vector and don't worry

Answer 2

KVM switch? or crutches with DLNA

Answer 3

HDMI Matrix Switcher such as VS-84HN. Controlled from the remote control, over the network or via rs232