Letter Connectors, Number Connectors, and Symbols

I am currently using Adobe Acrobat Pro DC and need to find some annotations or markups that I was able to use in my previous accounting job. There were some 'connectors' that were capital letters with circles around them. We used them for footing and cross footing. We also used mathematical symbols which could be green or red and small numbers with circles around them, also for footing and cross footing. Can anyone tell me if I have the right Adobe for these tools and where to find them? Thanks.