Edit Tab: Filters & Adjustments

The Edit tab holds Kleki’s filters and adjustments. At the top are Copy and Paste. Below them, the filters come in three groups.

Most filters change only the active layer. Filters that change the whole image say so below. Most dialogs show a preview, so you can see the result before you apply it.

Copy and Paste

• Copy opens the Copy To Clipboard dialog. If something is selected, Mask unselected copies only the selected area. Click To Clipboard to copy. If your browser can’t copy images directly, right-click or long-press the preview and copy it from there.
• Paste imports an image from the clipboard. See Importing Images.

Ctrl + C opens the same dialog with a crop option. Drag to crop the area you want to copy, or use Apply Crop to crop the canvas itself.

Geometry

Filter	What it does
Crop/Extend	Crops the whole image or adds space around it. Drag in the preview or enter the margins. Fill picks the color of new space.
Flip	Mirrors horizontally or vertically. Choose Flip Image for the whole image, or Flip Layer for the active layer.
Perspective	Distorts the active layer by dragging its four corners.
Resize	Changes the size of the whole image. Choose Smooth for photos and paintings, or Pixelated to keep pixel art sharp.
Rotate	Rotates the whole image by 90° to the left or right.
Transform	Moves, scales, rotates, and flips the active layer, with exact values. The Select Tool can do the same interactively.

Color and Detail

Filter	What it does
Bright/Contrast	Changes brightness and contrast.
Curves	Adjusts tones with curves, for all channels together or for red, green, and blue separately.
Distort	Adds wavy distortion.
Hue/Saturation	Shifts the colors and makes them more or less saturated.
Invert	Inverts the colors. Applies right away.
Tilt Shift	Blurs the top and bottom while keeping a band sharp, for a miniature look.
To Alpha	Turns brightness into transparency. Inverted Luminance (the default) makes white transparent and keeps dark lines. Luminance does the opposite. Replace RGB can recolor the result, for example in black.
Triangle Blur	Blurs the layer.
Unsharp Mask	Sharpens.

Turn a scan or photo of line art into a transparent layer

Import the scan as a layer, then use To Alpha with Inverted Luminance. The white paper becomes transparent and the lines stay. Set Replace RGB to black to clean up gray paper tones.

Generators

These draw something new onto the active layer.

Filter	What it does
Grid	Draws a grid.
Noise	Adds noise.
Pattern	Repeats part of the layer as a tiling pattern.
Vanish Point	Draws perspective guide lines from a vanishing point. Draw them on their own layer so you can hide them later.

Filters and Selections

If something is selected, most color and detail filters only change the selected area.

Filters Are Disabled

Many filters need WebGL, a browser feature for graphics. If it doesn’t work in your browser, these filters are grayed out and the Edit tab says “Features disabled because WebGL is failing.”

To fix it:

1. Turn on hardware acceleration in your browser settings. In Chrome and Edge it’s called Use graphics acceleration when available. Restart the browser.
2. Update your browser and your graphics drivers.
3. Try another browser.