How to prevent canvas from cracking when painting with acrylics?

To prevent canvas from cracking when painting with acrylics, you should:

Use a high-quality, stretched canvas that is primed with gesso or another primer specifically designed for acrylic paint.
Avoid using heavy impasto techniques or applying thick layers of paint, as this can put stress on the canvas fibers and cause cracking.
Use a medium or gel to thin the paint and make it more flexible, which can help reduce cracking.
Avoid exposing the painting to extreme temperature or humidity changes, as these can cause the paint and canvas to expand or contract and lead to cracking.
If your painting will be on display, make sure to use UV-protective varnish to protect the painting from fading or cracking due to exposure to light.