Merge pull request #3397 from travis-ci/TCI-154/Cron_jobs

Update cron-jobs.md

Author: stan-travis

user/cron-jobs.md

@@ -17,7 +17,10 @@ Configure cron jobs from the "Cron Jobs" settings tab on your Travis CI page.
 
 ## Add Cron Jobs
 
-Select the branch to run the build on, how often to run the build, and whether to run the build if there was a build in the last 24 hours, then click "Add":
+Add Cron jobs by filling out the following fields and clicking the Add button
+- **Branch** - Select the branch on which to run the build.
+- **Interval** - Select how often to run the build: `daily`, `weekly`, or `monthly`.
+- **Options** - Select between the option to `Always run` or `Do not run if there has been a build in the last 24h`.
 
 ![adding a cron job](/images/cron-adding.png "adding a cron job")