1/ Edit a movie — The Projects tab in iMovie is where you’ll do most of your editing. The first tab, Video, displays all the video clips stored on your iOS device or in iCloud – it’s the warehouse of raw video clips. The next tab, Projects, is where you do all the work. To make a movie, you’ll need to create a project, stir in some clips from the Video tab, then start editing.
The last tab, Theater, is where your projects go once they’re fully edited. Once you’ve “exported” a project to the Theater tab (aka iMovie Theater), you’ll be able to play your new movie on all iCloud-connected devices, stream it to an Apple TV, or upload it to YouTube.
2/ Create a new project & pick a theme — Once you have a general idea of how to make a movie in iMovie, go to the Projects tab and tap the big “+” button to create a new project. Pick a theme for your movie, anything from Modern to CNN iReport. (You can change the theme later.) You have two choices: make a movie, or create a trailer. Making a trailer involves collecting just-right sequence of action shots, profiles, landscapes, two-shots, and more, so it’s more complicated than it may seem.
3/ My Movie — Once you’ve created a project, you go into the My Movie interface. Tap the Media button (the one that looks like a film strip) and tap the Video tab. (If you’re using iMovie on your iPad, the Media window will already be sitting in the top corner of the My Movie screen.) Just tap the curved arrow to add a video to your iMovie project. Now tap a clip, then tap the curved arrow – when you do, the clip flies into the My Movie interface. Go ahead and tap the Media button again, and add another clip to the mix. Back on the My Movie screen, tap the Play button to watch your two video clips cut together, complete with a “dissolve” transition between them. In the bottom half of the screen, try dragging your new movie back and forth with your fingertip; the vertical line in the middle of the display shows the exact point in the clip that’s being displayed in the preview area above. You can add stills to your video too – just pick them from the Media tab. You can trim a still image just as you would a video clip.
4/ Trim your clips and change the transition — Tap the first clip in the lower editing section; it’ll be outlined in yellow. Go to the beginning or the end of the clip, tap-and-hold the thick yellow side, then drag to snip out this portion of the clip. (Don’t worry, you are not trimming the original video. This is ‘non-destructive editing’.) If you want to trim the second clip in your project, repeat the process.
Notice the little square with the bow tie between your two clips – that’s your transition, same as in iMovie for Mac. Tap it, and you’ll see a series of transition styles at the bottom of the screen, including Dissolve, Slide, Wipe, Fade etc. Tap one and press Play to see how each transition looks; you can also pick the None option for a ‘hard’ or ‘razor’ cut.
5/ To change your theme — Tap the Settings button (the one that looks like a gear), then pick a new theme from the list.
Extra … Fade-in, -out — To add fade-in/out effects to the beginning and end of your iMovie, tap Settings, then flip the switches next to “Fade in from black” and “Fade out from black.”
Want even more? Read the full article at Macworld. And here’s another: reverting a photo edited in the iOS Photos app back to the original in this 60-Second Video Tip at Apple World Today.