One of the new features introduced in Krita 2.9 is multiple document functionality. Unlike the older version you will be greeted with a screen similar to the screenshot below. There will be no canvas or new document open by default. To get started with Krita you have create a new document from the File menu.
A new document can be created as follows
Krita is a pretty complex program that can handle a lot of different files, so let's go past this step by step:
You can view and open a list of recently opened documents from this section
From this section you can create a document according to your requirement. i.e you can specify the Dimensions, Color model, Depth, Resolution etc.
In the top-most field is you can define a name for your new document. This name will appear in the metadata of the file, as well, Krita will use it for the auto-save functionality. You can leave it empty, then it will be referred to as 'unnamed' by- default.
From the predefined drop-down you can select predefined pixel-sizes, and the PPI.
You can custom dimensions, resolution and orientation of the document from the input fields below the predefined drop-down. This can also be saved as a new predefined preset for your future use by giving a name in 'save predefined as' field and clicking on the save button.
In the color section of the new document dialog box you can also select the color model and the bit-depth. Check Color Management for more info.
From the content section you can also select the background color and the amount of layers you want in the new document
Krita remembers the amount of layers you picked last time, so be careful.
This section allows you to create a document from an image that is in your clipboard for e.g. screenshot. It will have all the fields set to match the clipboard image.
These are separate categories where we deliver special defaults.
Templates are just *.kra files which are saved in a special location so it can be pulled up by Krita quickly.
You can make your own template file from any *.kra file, by using 'create template from image' in the file menu. This will add your current document as a new template, including all its properties along with the layers and layer contents.
Once you created a new document according to your preference you should now have a white canvas in front of you.
Now, just press on the canvas part. If everything's correct, you should be able to draw on the canvas! By default when you start Krita the brush tool should be selected, but if for some reason it not , you can click on this Icon from the toolbar and activate the brush tool. Of course, you'd want to use different brushes. On your right, there's a docker named Brush Presets(or on top, press f6 to find this one) with all these cute squares with pens and crayons.
Tick on any of the squares to choose a brush, and then draw on the canvas. To change colour, tick the triangle in the Advanced Colour Selector docker.
If you want to erase, we indeed have presets for that, but even quicker is using thebutton to quickly switch to erase mode. This is a mode which turns your exactly brush into the same thing, but then erasing instead of adding colour!
If you want to tweak the presets, check the Brush Settings in the topbar, you can easily access it with F5.
Now, once you have figured out how to draw something in Krita, you may want to save it.
The save option is in the same place as it is in all other computer programs: The top-menu of file, and then 'save'.
Select the folder you want to have your drawing, and select the file format you want to use ('.kra' is Krita's default format, and will save everything). And then hit Save.
Some versions of Krita have a minor bug though, and require you to not just select the file-format, but also type the extension. We're doing everything to have this fixed in all versions of Krita, but in-case it doesn't work properly, try this method.
And that's the bare basics!