Step 1. Prime drywall (texture adheres to primer much better than bare rock) Step 2. Texture to desired finish. Let dry. Step 3. Re-prime textured finish being very careful not to make too many passes while back-rolling/brushing as it will re-hydrate the mud & start to come off. Let dry. Step 3. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.