1/ Add a simple text signature to Mail for iOS — Unlike on Mac, you can only have one signature per email account on your iOS device. Choose Settings, then Mail, Contacts, Calendars. Choose Signature and create your Signature
2/ Add a complex signature to Mail for iOS — You can take a signature, complete with image, that you have created on your Mac and use it on your iOS device. Just send yourself an email that contains the signature you want to use. In the email you receive, click on the signature, Select all, then Copy. Now Select Settings>Mail, Contacts, Calendars>Signature
If you already have a signature saved, delete it.
Then double tap to get the save options and select paste. It will remain in place until you decide to change it.
3/ Free up space in iCloud — Call me a Scrooge but I have managed to resist buying extra storage space in iCloud for years now, and I’m running three devices on the account. The first easiest way is to delete emails you have received with attachments in them, and easiest of all is to do this on your Mac as you can delete multiples at once.
Please remember that iCloud is essentially a folder on a hard drive somewhere that you access over the internet, with access privileges set to you via your email address and Apple ID password.
4/ Delete iCloud backups to free up iCloud space — When a device is set to backup to iCloud, Apple automatically backs up data and settings stored locally on the particular device; it does not create a backup of data already stored in an iCloud account via Mac or iOS apps (from iOS 8.1, that includes iCloud Photo Library, shared photo albums, My Photo Stream, documents, contacts, calendars, mail, bookmarks, and notes).
iCloud backups include purchase history from the iTunes or App Store, app data, home screen and app organisation, iMessage/SMS/MMS text messages, device settings, and visual voicemail on an iOS device. But if you have multiple devices, old iCloud back-ups can quickly fill up their storage — particularly if they’re on the free (yay!) 5-gigabyte tier.
To delete an old iCloud backup from an iOS device, simply open the Settings app, and select iCloud, then select Storage. There’s a line graphic at the bottom of the following screen representing the amount of iCloud storage currently in use. Next, select the particular Backup to be deleted. Users with iCloud being used on multiple devices will have more than one.
Selecting particular old (and redundant) backups to delete (not the current one, obviously).
5/ Choose which apps back up — You can choose which apps back up, too – remember (and please note) that, unlike on Mac or PC where documents go into files and folders independent of the applications that create them, in most cases, iOS apps contain the docs they create within the originating apps – and these can be backed up. So disabling any non-essential apps from a backup frees up space within iCloud storage.
At the bottom of the Backup Info screen, there is an option to Delete the particular backup. Once the backup is deleted, the amount of available iCloud storage will increase in proportion to the size of the deleted backup. To delete an iCloud backup from a Mac, open System Preferences and select iCloud. Then, select the Manage button on the bottom right of the window.