Does AntiSpam work for IMAP accounts in Thunderbird?
Also, will this or some other Bitdefender Total Security module catch malaware if I visit Gmail, Yahoomail etc on their web sites?
No, antispam only works on POP. With browser based mail you are protected by AVC realtime only. Not antispam.
Rich Text Editor.
To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph.
An inline formatting menu will show up when you select text. Hit tab to get into that menu.
Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.