Pre-moistened lens wipes are the best option for cleaning stubborn smudges or dirty spots on your lens. Zeiss and PEC-PAD are trusted brands for non-abrasive, lint-free wipes. Do not use cleaning wipes that are not specifically labelled for use on camera lenses. Take a wipe from the pack and press it against the center of the lens. Move the wipe in a circular motion, slowly spiraling toward the outside. Try not to wipe the lens multiple times in the same spot or you'll simply move the dirt particles around. If a second pass on the lens is necessary, use a clean portion of the wipe or use a new one. These lens wipes are not meant to be reused, so throw them away after you use them. Using old wipes will transfer grime back onto your lens, and this may end up scratching the glass. If the wipe is still damp and a section of it is clean, use it to wipe down another less-fragile piece of your camera equipment before you throw it away.

Summary: Buy single-use camera lens wipes. Wipe from the center of the lens in an outward spiral. Dispose of the used wipe.

If you are using Android 4.3, you can enable a black-and-white emoji keyboard. This will enable the black-and-white emoji keyboard for your device.

Summary: Open the device's Settings menu. Scroll down to the Personal section. Tap Language & input. Check the iWnn IME box. Open an app that allows you to type. Press and hold the Space bar on your keyboard. Tap the Category button to change emoji categories. Tap the << and >> buttons to view more pages. Tap an emoji character to insert it.

If you don't want just anybody to access your PDF, you go to Tools > Protect > Encrypt > Encrypt with Password and select "Require a Password to Open this Document". Enter your desired password and confirm. From this menu you can also set advanced settings like encryption levels and compatibility with earlier versions of acrobat to make sure legacy users will also not have access. If you want people to be able to view your PDF but ensure that no changes are made, you can restrict editing access. Navigate to Tools > Protect > Restrict Editing. Input your desired password and press "OK" to confirm. In order to undo any security on your PDF, navigate to Tools > Protect > Encrypt > Remove Security. Press "OK" to confirm and save the change. Depending on the type of security used, you may be prompted to input your password before you can remove it.

Summary: Add a password to restrict viewing access. Add a password to restrict editing access. Remove a password.

It's a menu item at the top of the screen. Clicking it prompts a drop-down menu. You'll find this option near the top of the drop-down menu. It's on the left side of the pop-up window. This option is at the bottom of the pop-up window. Doing so adds a new track to your GarageBand project. In the "Library" section on the left side of the window, select a category of instrument, then click the specific instrument you want to use for your new track. You can first edit your track's preferences by clicking the knob icon on the right side of the track's box and then changing any necessary settings in the pop-up window. Click Window, then click Show Musical Typing. This will ensure that you have a reference while recording your music. It's a red circle at the top of the window. Once the four metronome clicks play, you can begin playing your instrument by pressing the keyboard keys which pertain to the notes you want to play. Click the "Record" button again to do so. This will save your track. Click and drag the upper-right corner of a recorded track to extend it into a loop. If you want to divide a track into two separate pieces which can be moved independently of one another, drag the playhead to the point at which you want to split the clip, then press Command+T. Once you've added the main track for your music, you can add additional tracks with different instruments (e.g., bass or synths).
Summary: Click Track. Click New Track. Click Software Instrument. Click Create. Select an instrument. Bring up the Musical Typing window. Click the "Record" button. Play your instrument. Stop the recording. Loop a recorded instrument. Split a track. Add and record more tracks.