Because of the unreliable nature of wireless connections, it is wise to copy-and-paste text from long posts into a program like "Notepad" or "TextEdit" before clicking "Submit". In case the submit fails, you will still have a copy that can be copy-and-pasted back in, after the wireless connection is working again.
You may use the HTML view of the text editor to create or paste in HTML code. (Look for the text editor button "<>"). This is particularly useful when using a program that creates well-structure HTML code. It is also useful when adding "embed codes", such as with video content.
Double-check (and fix any errors!) after pasting into a text box, especially after copying from a program like Microsoft Word - invisible formatting codes can get carried over may prevent the content from displaying correctly.
To prevent undesired formatting codes from carrying over when copy-and-pasting, first paste text into a program like "Notepad" or "TextEdit" to remove all formatting codes, then copy the "cleaned" text from that program, and then paste the "clean" text. Then, use the text editor on the site to modify the formatting.