How to Make a Simple Poster Using Photoshop
Version of Photoshop
It doesn't matter which version of Photoshop you use, I'm using Photoshop CC 2014 for this tutorial. If you don't have the same version, you might have to do a little searching for specific tools, but since this is a simple poster I'll be making, it shouldn't be a problem finding every button.
Making a Poster From Scratch or Using Other Photos
There are two ways you can make a simple poster, you either come up with something by yourself and make it from scratch, or you use photos to make a good-looking poster.
I'll go through both of them, starting with making one from scratch.
Poster from Scratch
Start off by clicking on File and then New. Here you have some options to choose what size your poster will be. I'll use a 1920x1080 resolution for this tutorial, you can use any resolution you want.
Now, you have a blank image, to change this go to Edit > Fill, and choose a color for the background. After that, in the bottom right corner where the layers are, if there is a lock next to your background layer then click on it, this will unlock your layer so you can modify it.
After you unlocked the layer, click on the "fx" button at the bottom of the window.
A new window opens up and there are a few effects for your layer, for now we'll choose "Gradient Overlay". Here you can play around with the Blend Modes and other settings.
I'll choose "Overlay" at the Blend Mode, set opacity to about 80%, use the "Neutral Density" gradient with "Reverse" checked and Style set to "Radial" and finally, Scale at 150%.
This will give the background a slight white glow in the middle.
Now you can add some simple text or a short quote if you'd like, preferably one that fits the color you chose. I'm just going to type "Emotions" with a font called "Bebas Regular" and set the Opacity to 29%. You can change the layer Opacity in the bottom right corner, select a layer and click on Opacity.
Now you can decorate the image with some hearts around or on the text. Start off by selecting the "Custom Shape" tool shown in the picture below. Then start adding hearts after selecting your main layer and the heart shape from the toolbar.
Now just change the layer Opacity and you're done!
Here you can see the final result.
Making a Poster Using Photos
If you have good photos, you're going to like this part. Again, start off by opening a file with Photoshop, I'll use a photo from the internet for this tutorial.
After you opened your photo, you're free to toy around with Filters and the Layer Effects we used before. I'm going to use a Photo Filter, more precisely a "Warming Filter" and the "Radial Gradient" from the previous tutorial.
Now just add some text again.
Let me know in the comments or the poll if this was useful.