CKEditor is a the default editor on the processwire CMS. Generally speaking it is a well functioning editor, but it does have some advanced features which can lead to frustration.
One of these is the advanced content filter. Settings for this allow certain attributes which would normally be removed upon saving your document.
One very commonly used element is the id attribute – i.e.
By default CKEditor will strip this out as it is setup in processwire. To change this you need to edit the field for which you would like this tag left in, click on the “Input” tab, and then scroll down to “Extra Allowed Content” and enter the following:
This allows the id attribute (optionally – “*”).
Another commonly used tag that is stripped out is classes on div tags. In the same box as above you could enter the following to allow, for example,
Hope this saves you hours of searching around!