Viewport problem; what happemed here?

[AlmaTalp]

Hello guys,

I ran to a problem never before; my viewport looks like this; outside of a camera-shaped ‘object’ nothing is viewable.
Should be something very obvious I missed:))))

What is the solution? Thanks.

[Richard_Marklew]

Alt+B = clipping border

[AlmaTalp]

Richard, you are a lifesaver as always. Thanks.