The most common signs that a plant is getting too much sunlight are wilting leaves, brown leaf tips or margins, and scorching.
Leaves wilt when they get too much sunlight because the plant is not able to transpire water quickly enough due to the heat from the sun.
This can result in the leaves drying out and dying.
Leaves turn brown when they get too much sunlight because the plant is not able to produce enough chlorophyll to photosynthesize.
Without photosynthesis, the leaves cannot produce the food that the plant needs to survive and will die.
A plant scorches when it gets too much sunlight because the leaves are burning due to the high levels of heat from the sun.
Scorched leaves will often look black or charred and will be crispy to the touch.
If your plant is getting too much sunlight, you can move it to a shady spot or put a shade cloth or thin curtain over it until it recovers.