By default JCE adopts the style settings in your template stylesheet template.css. If your template design adversely affects the styling or layout when making changes to content in JCE Editor, you might want to customise the CSS by creating a custom template for JCE.
If you want to insert an iframe into a Joomla article using JCE Editor Pro (my preferred editor in Joomla) you may need to enable this in the Editor Profiles for the profile you are using to prevent the code from being stripped.
If you want to insert any Javascript into a Joomla article using JCE Editor Pro (my preferred editor in Joomla) you may need to enable this in the Editor Profiles for the profile you are using to prevent the code from being stripped.
The default file upload limit in JCE is 1024 KB and you need to increase this to upload anything larger
