Adjustments
How to Adjust Brightness, Contrast, and Saturation in Photasium
A dark phone shot, a dull listing, or a faded scan can take a brightness, contrast, or saturation pass. In Photasium that happens in the tab: the file never goes to a server.
Toning the layer
Adjustments change brightness, contrast, saturation, and an RGB curve on the selected raster layer, with a live preview. Apply writes the look into the pixels. Cancel, or click outside the dialog, restores the previous pixels.
Blur (R) paints a local soften. Image → Blur applies to the whole raster layer, or inside a selection if one is active.
A darker or flatter shot
A night story or an indoor post often needs more brightness before it reads on a phone. Contrast brings the lights and the pavement apart. Saturation lifts colour that looks washed.
Duplicate the raster first if you want a spare of the original. Adjustments write into that layer when you apply.
A listing can look grey under shop lights. A little saturation and contrast on the product layer lifts it without changing the background. Keep the work on that raster so type on a layer above stays as you set it.
A faded screenshot is easier to read after a contrast bump. If the capture is a photo of a display, brightness helps more than saturation.
A scan that looks muddy on paper can take an RGB curve: lift the middle for overall brightness, or steepen the line for more contrast. Image → Sharpen after that if the print size shows softness.
Adjusting in Photasium
Open a photo
Open the editor, then File → Open, or drop an image on the canvas. Click the raster in the Layers panel. Image → Adjustments is disabled until a raster is selected.
Choose Adjustments
Open Image → Adjustments. The dialog previews live on the selected raster layer. A locked layer will not accept the sliders.
Set the look
Brightness, Contrast, and Saturation each run from -100 to 100, with 0 as the starting point. Curves (RGB) is one curve for all channels. Click to add a point, drag to reshape, double-click a point to remove it. The ends stay at 0 and 255 on the horizontal axis.
Apply
Apply writes the look into the layer and closes the dialog. Reset zeros the sliders and restores the pixels without closing. Cancel, or click outside, discards the preview. Undo after Apply restores the layer from before that Apply.
Image → Blur and Image → Sharpen are on the same menu. Blur radius runs from 1 to 40 pixels. Sharpen radius runs from 0.5 to 12, with Amount from 10 to 300 percent. A selection limits where those filters apply. Blur in the toolbar paints a local soften. Rasterize type first if you need to adjust the letters as pixels.
The look on the pixels
After Apply the raster holds the new tone, nothing was uploaded, and undo brings the previous pixels back. Duplicate before you apply if you want the unadjusted layer still in the stack.
Download PNG, JPEG, or WebP if you need a file to send. Come back later and the document is still listed under the editor, until this browser’s storage is cleared. Adjustments sit with the other photo editing tools: pick the raster, export a listing.