iosipadtext inputundo/redo
Seemingly fairly regularly, I find myself clicking on the X in a circle to the right of a text field in an iOS app on my iPad, instead of just placing the cursor next to the final character in the text field. Extremely annoying.
Is there a global undo operation that I just can't find through google, or at least one for the factory provided "Clock" app, which I seem to have the most of this type of problem with?
As with the iPhone, if you shake the iPad vigorously, you get offered the choice of:
For me, this doesn't feel at all natural on the iPad, and I imagine that's why some iPad applications (e.g. Textastic) provide their own Undo/Redo buttons.
Edit
Thanks to @Lizzan for also pointing out in the comments:
There's also an Undo button in the bottom left on the numerical keyboard - makes a bit more sense than shaking the iPad.
The Documents app works very well together with the iPhone and iPad versions of PDF Expert (by the same company). You do need to go through the share dialog and you could use another tool such as PDF Pen Pro if you prefer or wanted a universal app for editing PDF that you locate and move using Documents app.
Since iOS abstracts away the filesystem, unless you are careful to push changes back to a cloud storage location, you can get files duplicated, wrong versions and revisions. I don't think there is a silver bullet solution at this point for iOS file management other than using a single app that syncs directly to a shared folder.
Luckily, PDF Expert does just that and works with a plethora of server backed storage options - Dropbox, WebDAV, Google Drive, FTP / SFTP, Office 365 / SkyDrive, Box, Oxygen and Huddle currently:
Even better, you can set up sync to minimize the chance that you will forget to upload or download a changed document.
Best Answer
The global undo guesture is to shake the device.