Blind Leading the Blind.
"Tell Seamus it's the pointy end that goes into the breech first - we don't want any repetition of last week's affair !"
[Penny Washers,
It is with the greatest trepidation that I (for the first time) offer computer advice, always having had to ask for it before. But assuming you mean the "blue quotation box", then swipe your cursor over the text involved, it should turn blue. On the RH end of the row of logos above "Quick Reply" box, you should find a little rectangular "page of text" one. Click on that.
Your text in question should now have at the front and back "quote"... "/quote" (may appear in upper or lower case).
Try it. Send it. Should work. Happy New Year. Danny].