Background Service is used when even user close application (discard from recents) and when Service is doing something not visible to user like downloading data from server, load data from a ContentProvider etc.. And Foreground Service is less likely to be killed by system on low memory.
What is foreground colors?
The foreground color is also the beginning color of a default gradient applied by the Gradient tool. The background color is the color you apply with the Eraser tool and is the ending color of the default gradient.
How do I change the color of my foreground?
Select the Eyedropper tool on the toolbox, and then click anywhere in the active document to change the foreground color. Hold down the Alt (Win) or Option (Mac) key, and then click to change the background color. Click on a color swatch in the Swatches panel to change the foreground color.
How do I color faster in Photoshop?
Command/Ctrl + Backspace – Foreground Color, Alt/Option + Backspace – Background Color, Shift + Backspace – Fill Options. Great way to fill color into selections or change the color of text and vector shape layers.
How do you use a color picker?
To choose a color from the HUD Color Picker, select any painting tool. Then press Shift+Alt+right-click (Control+Option+Command on the Mac) and click in your image window to display the HUD Color Picker. Drag to select your desired hue and shade (you can release the keys while you drag).
Where is the eyedropper in Photoshop?
Select the foreground (or the background) in the Tools panel or the Color panel. Select the Eyedropper tool in the Tools panel (or press the I key). Fortunately, the Eyedropper looks exactly like a real eyedropper. Click the color in your image that you want to use.