In one sentence, describe what the following article is about: It's the blue icon with a white "f" on your home screen (iPhone/iPad) or in the app drawer (Android). If you're not signed in to Facebook, enter your account credentials and tap Log In. You can zoom in or out on any Facebook photo, including peoples' profile photos and those posted in the news feed. It's not possible to zoom in or out on a Facebook video on your mobile device. The photo will now appear in full-screen mode. If you selected a post with multiple photos, tap any of the photos, then scroll up or down to the photo you want to see. When it's on the screen, tap it to open it in full-screen mode. Before you can zoom out, you'll need to zoom in. Begin by placing two fingers together over the part of the photo you want to see enlarged, then move your fingers apart. Think of the motion as the opposite of a pinch. While zoomed in, you can move the photo around using one finger. Place two fingers anywhere on the screen and pinch them together. Continue making this motion until the photo appears in its normal size. You can do this at any time while zoomed in or out.
Summary: Open Facebook. Navigate to a photo. Tap the photo. Pinch outward with two fingers to zoom in. Pinch inward to zoom out. Double-tap the screen to exit zoom mode.

In one sentence, describe what the following article is about: To make a two-story hamster house, you will need two empty tissue boxes, a pair of scissors, a ruler, non-toxic glue, several empty toilet paper tubes, and several small pieces of cloth. Square tissue boxes will work better than rectangular boxes to make the house. Removing the plastic will make it easier for your hamster to go through the openings. Stacking the boxes on top of each other will create the upper and lower levels of the house. Stack the boxes so that the top opening of each box is facing to the right or to the left. The openings should not be on the same side of the house. Measuring this distance will allow you to know what length of tube you will need to create a walkway up to the upper level. You may need to place several toilet paper tubes within one another to make a long enough walkway from the lower to upper level. Use non-toxic glue to attach the tubes to each other, if necessary. Use non-toxic glue to attach cloth to the inside of the walkway. The cloth will give your hamster extra traction so that he can easily walk up and down the tube. Do not make the incline so steep that your hamster will have trouble walking up or down the tube. Use non-toxic glue, rather than tape, to attach the walkway to the second floor box. Securing the walkway will ensure that it does not move when the hamster walks up or down the tube. If the opening is rounded, use scissors cut the bottom of the opening into a straight line.
Summary: Gather the materials that you will need. Use scissors to cut away the plastic opening of the tissue boxes. Stack the boxes on top of each other and glue them together. Use a ruler to measure the distance from the top opening to the floor. Create a walkway using the toilet paper tubes. Secure the walkway to the opening of the second floor box.

In one sentence, describe what the following article is about: Ducks tolerate cold very well, but tend to dislike wind. Make sure your ducks have some protection from the wind over the winter. This is important to their health and overall well-being. Hang a tarp up in one corner of your duck's pen. If it gets windy, your ducks can shield themselves behind the tarp. You can also purchase a small outdoor wind shelter for your ducks. When they breathe, ducks tend to emit a lot of moisture. This can cause health conditions, such as frostbite, in the winter. A duck shelter should never be completely closed off from outside air. Keep some air vents in the shelter. You can use mesh material on some parts of the shelter, or install small windows. In order to protect your ducks from the cold and from predators, vents should always be up high. Do not install any air vents on ground level. Ducks enjoy swimming, even in the winter. While most ducks can tolerate water at cold temperatures, it's best to err on the side of caution. Wait until a sunnier, warmer day arrives to set out a pool for your ducks. Use a deep, wide pool on warmer days to allow your ducks to swim and bathe.
Summary:
Make sure to protect ducks from the wind. Ventilate your ducks' shelter properly. Allow your ducks to bathe on sunny days.