On the iMac wireless keyboard it is the second key from the left, on the very top of the keyboard. You can also open System Preferences and then click Display. There on the Display tab you will see a brightness control slider.
Press Shift>Option>8
This trick only works with an iMac not a pc , depends what computer you have in hand. All you do on the Mac is press the command button and press the letter v at the same time :) hope this helps but remember you press the keyboards at the same time NOTE! : This only wokrs on the iMac
The iMac keyboard has brightness keys - on the current model on the F1 and F2 keys. The screen can be calibrated by selecting Displays within System Preferences, then clicking the Color button and the Calibrate... button. This will talk you through the screen calibration.
by pressing f1 for darkness and f2 for brightness that's if you have a imac computer
By pressing the power button on the back
if you have got the wireless keyboard you just press the button on the top right, if not you click on the disk and drag to the trash can icon which will of changed to a eject icon
On an iMac, there isn't a dedicated physical eject button like on some other devices. Instead, you can eject a disc by clicking the Finder icon, selecting the disc from the sidebar, and then clicking the eject icon next to it. Alternatively, you can press Command (⌘) + E on your keyboard to eject the selected disc. If you have a keyboard with an eject key, it may also serve this purpose.
There is no Start button per se. Finder is the equilivant of Start on a Windows PC.
Press the enter key.
Turn it on by pushing the power button on the back left bottom of the iMac.
To delete entries you've added to the Dictionary on your iMac, open the "Dictionary" app, then go to the "Edit" menu and select "Delete" or press the "Delete" key after selecting the entry you want to remove. If you’ve added custom words, you can also find them in the "User" dictionary section and delete them from there. Alternatively, you can reset the Dictionary by deleting the files in the "~/Library/Dictionaries" folder, but this will remove all custom entries.
Finder works just like the Start button on a Windows PC.