You can add any individual item in Franklin by clicking on the Add to PennTags link at the bottom of the screen. However, only individual records can be added to PennTags. Search results can not be tagged at this time. Screen shot

Go directly to VCat (link: http://www.library.upenn.edu/catalogs/vcat/). Add any item from its record in VCat by clicking on the Add to PennTags link at the bottom of the record screen. Screen shot

Article search engines don't always provide stable URLs, so we can't add these URLs to PennTags. However, using PennText works around this problem. So, when searching an article search engine like MEDLINE or EBSCO MegaFILE, use the PennText button (image of penntext button here) to open the PennText menu and then click the Add to PennTags link at the bottom of the screen.
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When you have a journal article or journal citation that you want to add to PennTags there are a couple of options available to you.

If you are viewing an electronic journal article that you want to add to PennTags see if there is a DOI for the article. A DOI is a stable link for that journal article, they look like this 10.1103/PhysRevE.70.066403 and are usually found at the top of the article. If a DOI is present then use the bookmarklet (link to getting started section) to get to the posting page. On the posting page you will need to erase the URL that is there and paste in the DOI as it appears on the article page. Once you have done that you can add your post to PennTags as you usually do.

If there is no DOI, use the method explained below. Note: Do not add the URL of the journal article from an e-journal as these URLs are usually temporary and stop working a short time after you visit the page.

If there is no DOI or you have a journal citation that you want to add, you will need to use the "Already Have a Citation, Try PennText" link on the Library's homepage. Enter your citation, and click the Add to PennTags link from the resulting PennText menu. Note that by doing this, you are adding the PennText menu for your article - not the article itself - to PennTags. That way you'll be able to find online and/or print copies of your article whenever you need it. Screen shot

Because these article search engines offer the full-text of every article they index, they don't include a PennText button. To work around this issue, take note of the following options.
JSTOR (on campus) -- You can add any JSTOR article just as you would add a normal webpage. From the article screen, click the bookmarklet. Unfortunately, the link you create will only work from on campus, though we are working to improve this situation.
LexisNexis and Factiva -- Unfortunately, these article search engines make it impossible for us to create steady links into their resources. We wish they would correct this problem; sadly, there is no way to add an article to PennTags from within these search engines. You can work around this by noting the citations you want to add and then using the "Already Have a Citation? Try PennText" link from the library homepage. Essentially, you're starting from scratch with a citation for an article (see Journal Articles(make this a link) for how to do this) . Screen shot