AKVIS OilPaint can work independently as a standalone program as well as a plugin to a photo editor.
Standalone is an independent program. You can run it in the usual way.
Plugin is an add-on for graphics editors, for example for Photoshop, AliveColors, and other compatible programs. To call the plugin, select it from filters of your image editing program.
The workspace will be arranged according to the interface mode chosen in the Control Panel: Express, Advanced, or Presets.
The first time you run the program, it is displayed in Express mode, with a simplified interface and a minimal set of sliders, which help to quickly obtain a satisfactory result.

Experienced users who are familiar with the capabilities of AKVIS OilPaint can switch to Advanced mode: the interface's appearance will change, granting access to the full functionality of the program.
Note: All features and parameters work in Express mode as well; some are hidden and the program uses values of a chosen preset.

The Presets button in the top panel allows you to switch to the visual display mode of presets (Presets Gallery).

The left part of the AKVIS OilPaint window is taken by the Image Window with two tabs: Before and After. Under the Before tab you can see the original photo. The After tab shows the resulting image. You can switch between the windows by clicking the tab. To compare the original and the resulting images, click in the image and hold the button pressed - the program will currently switch between tabs.
In the upper part of the program's window, there is the Control Panel with the following controls:
opens the home page of AKVIS OilPaint.
(only in the standalone version) opens an image for processing. The hot-keys are Ctrl+O on Windows, ⌘+O on Mac.
(only in the standalone version) saves the image to the disk. The hot-keys are Ctrl+S on Windows, ⌘+S on Mac.
(only in the standalone version) calls the Print dialog box. The hot-keys are Ctrl+P on Windows, ⌘+P on Mac.
loads a list of presets (.oilpaint file).
saves user presets to a file with the .oilpaint extension.
(only in the standalone version) opens the Batch Processing dialog to automatically process a series of images.
loads saved guiding lines (.direction file).
saves the guiding lines to a .direction file.
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shows/hides the guiding lines.
cancels the last operation (with the tools). It is possible to cancel several operations in a row. The hotkeys are Ctrl+Z on Windows, ⌘+Z on Mac.
returns the last canceled operation. It is possible to return several operations in a row. The hotkeys are Ctrl+Y on Windows, ⌘+Y on Mac.
initiates image processing with the current settings. The resulting image is shown in the After tab.
(only in the plugin version) applies the result to the image and closes the plugin.
shows information about the program: version, trial period, license.
calls the Help files. The hot-key is F1.
calls the Preferences dialog box for changing the program's options.
opens a window showing the latest news about OilPaint.
To the left of the Image Window, there is the Toolbar. Different tools appear on the Before/After tabs.
Navigate and scale the image using the Navigator. The frame in the Navigator surrounds the area of the image which is visible in the Image Window; the area outside of the frame will be shaded. The frame can be dragged, thereby changing the visible portion of the image. To move the frame, place the cursor within it, left-click the mouse, and drag.

To scroll the image in the Image Window you can press the spacebar on the keyboard and drag the image with the left mouse button. Use the scroll wheel of the mouse to move the image up/down, by keeping the Ctrl key pressed – to the left/to the right, by keeping the Alt key pressed − scale the image. Right-click the scroll bar to activate the quick navigation menu.
Use the slider to scale the image in the Image Window. When you move the slider to the right, the image scale increases. When you move the slider to the left, the image scale reduces.
You can also change the image scale by entering a new coefficient into the scale field. The fall-down menu shows some frequently used coefficients.
You can use hot-keys to change the image scale + and Ctrl++ (⌘++ in Mac) to increase the image scale and - and Ctrl+- (⌘+- in Mac) to reduce the scale.
Under the Navigator, there is the Settings Panel with the Presets list and the tabs of parameters:
Under the settings, you can see Hints for the parameters and buttons when you hover over them with the cursor. You can choose where the hints will be shown or hide them in the program's Preferences.