In one sentence, describe what the following article is about: Divide your hair into 2-inch (5-cm) sections, starting at the nape and gradually working up the back of the head and around to the sides and front of your hair.  You can either separate all the sections out at the beginning of the process or separate them out as you work. The choice is up to you, but if you are new at this and want to make sure that the sections stay even in size, you might find it easier to separate all the sections out at the beginning. Clip each section back with a bobby pin or other clip. Working one section at a time, apply a dot of hair gel to your natural hair, smoothing it down securely.  The hair gel gives your hair a little extra hold. Using it helps prevent the twist from unraveling when completed. The gel can also help tame some frizziness that may occur after you wash your hair. You can also apply a little gel as you need it during the twisting process. Gel should only be used in small dabs for the purpose of smoothing down stray pieces. Take one section of Marley hair from your package and bend it at the halfway point. Hold it between two fingers at this point so that it forms an upside-down U-shape.  Take this time to separate the strands of the Marley hair. Since the hair comes in tightly bundled sections, separating these sections is definitely necessary. All you really need to do is to pull down on each section a few times until you notice the hair start to unwind or loosen from its bundle. They should still be clumped together well enough to work with when done. You should also play with both hanging ends of the section so that the hair tapers off instead of coming to a blunt, hard stop. Start with a section of hair at the back and bottom of your head. Place the bent center of your Marley hair over the top of your real hair, keeping your real hair in the center. You should be holding three sections of hair in your hands at this point. Braid the three sections together for about 1 inch (2.5 cm). This braid will secure the extensions in your hair. After you braid the hair, rearrange the remaining loose ends so that you have two sections instead of three. The simplest way to do this is to split the center section in half, distributing equal amounts of the section to the two side sections. Twist the remaining two loose sections around each other, wrapping them securely enough so that they feel tight, but keeping them loose enough to prevent them from starting to coil into a spring. After you let go of a finished twist, it will likely spring back a little and feel somewhat loose. This should not be a problem, though. The twist is still thick enough to stay in place. Use scissors or a razor blade to shave off any hair that extends past your desired length. Seal the end by dipping it into boiling water.  When cutting off the excess hair, use the sharp side of the blade and carefully pass it over the ends at a vertical angle. This creates a more natural looking end. Do not cut the hair straight across as though you were cutting into a piece of paper. Boil the water in a saucepan on the stove. After it reaches a boil, remove it from the heat and dip your hair into it then. Do not dip the ends of your hair into the boiling water while it is still over an active heating element on your stove. Dry the ends with a towel when done. Use the same procedure outlined above with the remaining sections of your hair. Continue twisting in Marley extensions until your entire hair has been styled.  Only leave the hair in the boiling water for a few seconds. Dry them off with a towel when done. For added flair, you can also curl the untwisted ends of each section with perm rods or a curling iron, but doing so is only optional.
Summary: Separate your hair into sections. Apply hair gel to one section. Bend a section of Marley hair. Place the bend around one section of your own hair. Braid it in place. Twist the hair to the end. Tidy the end. Repeat as needed.

In one sentence, describe what the following article is about: Make sure that the photo lends itself to color inversion. The change will be most dramatic if the image is very dark or very light. Understand that the inversion will replace each color with its corresponding opposite: the brightness value of each pixel is converted to the inverse value on the 256-step color-values scale. Think about whether the photo will be more or less powerful, once inverted. If you aren't sure, it can't hurt to try! Open the "Window" menu, then choose "Layers" to reveal the Layers panel if you can't already see it. Remember; you are not actually changing the colors of the original image file – you are creating a color-inverted layer on top of the base.  If you want to invert the colors in a specific section of the image, use the selection tools—Marquee, Lasso and Magic Wand—to mark out the part that you wish to invert. If you want to invert the colors across the entire image, then you don't need an active selection.  If you're inverting a complex composition, you can add a new layer at the top of the layer stack. Then, press ⇧ Shift+Ctrl+E to create a merged version of your entire composite without changing the deeper layers. Click on the unlabeled "Create New Fill or Adjustment Layer" button at the bottom of the Layers panel; you can find the correct button by hovering over the options. Choose "Invert" from the drop-down menu that appears. Photoshop adds an "Invert Adjustment" layer to your layer stack immediately above either the topmost layer or the layer that was active when you added the adjustment. If you made a selection before adding the adjustment, Photoshop builds a layer mask for the Invert layer. The program inverts the colors in the area that you selected. Drag the Invert layer up or down the layer stack to a new position. Any given layer only acts upon the layers below it, so the inversion's position in the layer stack determines its impact on your file. Shift-click on the layer mask applied to your Invert adjustment layer to disable the mask and apply the adjustment to your entire file. Click on the layer mask icon to enable the adjustment again. Turn off the eyeball indicator at the left edge of the Invert layer listing to disable the adjustment itself. After inverting an image, select Create New Snapshot. Keep each image open in a separate tab. This way, you can work with both the original image and the inverted image.
Summary:
Open an image in Photoshop. Open the Layers panel. Invert the image. Arrange the inverted layer. Toggle the inverted layer on and off. Try working with the inverted and non-inverted image side-by-side.