How to change material by icon when playing?

I try my best to google many tutorial.But still failed.
I don’t know how to change material by icon when playing?Like this [Unreal Engine 4 – Loft in London Virtual Tour – Tech Demo [60fps][FullHD] - YouTube][1] at 01:20

I want to know how to build this step by step

Please help me or give the best tutorial link fo me

thanks a lot

See My Video Tutorial Unreal Engine 4 UMG Set Material. - YouTube

thak you
But how to auto appear button when you move close to furniture,disappearing button when you move away from furniture?

Or double press F than button disappear

thak you But how to auto appear button when you move close to furniture,disappearing button when you move away from furniture?

Or double press F than button disappear

Beacause you need create a trigger when overlap show the widget

isn’t any tutorial video? thank you very much :smiley:

Look at this Instanced Materials in Unreal Engine | Unreal Engine 5.2 Documentation