HOWTO |MARK UP A MESSAGE AND USE MAIL DROP
Create a new message
Open Mail and create a new message. Markup works on images and PDFs, so drag a file of either kind into the message window. Remember there’s an image size control at the top-right corner, which you should set to Actual Size if you’re going to mark up the document.
Open the Markup tool
Place the pointer over an attached PDF or image and a box containing an arrow appears at the attachment’s top-right corner. Click it and choose Markup to open the Markup tool. (The More item takes you to OS X’s Extensions preferences, where you can disable Markup.)
3 Sketch something Select the Sketch tool from the far-left of the toolbar to sketch freehand. If Mail detects you’re trying to draw a particular shape it will auto-correct your sketch. In the palette that appears at the top-left corner after you draw something is an option to use your exact sketch.
4 Add some text Add text by clicking the ‘T’ in the toolbar, and set its properties using the Text Style tool (the ‘A’ in the toolbar). Set the text’s colour with that tool, and set its background fill and border with the two tools to the left of it. Move markup by clicking on it and then dragging on its box.
5 Add your signature You can sign documents digitally using Markup. Click the Sign tool (fourth from the left in the toolbar) and choose whether to sign using your trackpad or by holding up a paper copy of your signature for your Mac’s camera to scan and import into the document.
6 Sign your name Here we’re using the trackpad option. Use your finger to write your signature across the trackpad. When finished, tap any key to save the signature. Press Clear to start over, or press Done and then choose the signature from the Sign tool’s menu to insert it as an annotation.
7 Add large attachments To use Mail Drop, ensure you’re signed into iCloud in System Preferences and, in Mail, go to Preferences > Accounts > Advanced. Check the Mail Drop option. It won’t count against your iCloud storage (handy if space is low) and should work with any email provider.
8 Send a huge message When you add attachments to a message Mail summarises the message’s total size. If this goes beyond about 20MB, Mail will use Mail Drop to send attachments to Apple’s servers. If the other person has OS X Yosemite, the attachments will download automatically.