How to activate self timer - Canon PowerShot A540 Digital Camera

Touch the self-timer button (the one-handed clock) on the touch panel to cycle through the self-timer modes. Start the self-timer by pressing the shutter release button.

Press the MENU button, select "Drive Mode," then select the self-timer (one-handed clock).

Press the self-timer button (marked with a one-handed clock). Use up/down to select an option. To activate the self-timer, press the shutter-release button as normal.

Yes, it has self timer function. Please check button that has clock symbol, press it to select self timer, press shutter button to activate it.
Hope this ifno will help you.
Thanks.

Press the self-timer button just to the right of the LCD panel and confirm that the self-timer icon appears. Press the shutter release halfway to focus and meter. Press the shutter the rest of the way to activate.To cancel, either turn the camera off or press the self-timer button until the self-timer icon disappears.

You can get a manual at http://www.butkus.org/chinon/nikon.htm

Press the MENU button, select "Drive Mode," then select the self-timer (one-handed clock). Start the self-timer by pressing the shutter release button.

1. Secure the camera to a tripod or place it on a stable surface.
2. Rotate the mode dial to [S], [P], [PICT], [AV], or [M]
3. Press the Power button turn on the Camera.
4. Press arrow [>] .
5. Use up arrow or down arrow to select the desired self-timer mode.
6. Compose your scene and press the shutter button.

• The self-timer function is activated.
• The photograph is then taken after the preset time.
• To cancel the self-timer at any time, press the shutter button.

After one shot is taken, the self-timer mode is turned off.
If you wish to take another image using the self-timer, repeat these steps.

No problem! Like all Samsung Digimax cameras, the self-timer is located by pressing the round navigation key once to the right/East/3 o'clock (it has a picture of a clock engraved on it). Pressing once gives a 10 second timer, twice gives a 25 second timer and the third press gives a multiple-burst self-timer whilst the fourth press will de-activate all timer functions. After selecting the appropriate self timer, depress the shutter button to activate.
I hope that this helps!

Once you have the self-timer set up, press the shutter release button to activate it.

The instruction manual is quite poor. Once you have decided which option you would like (2 or 10 seconds) you must go back to the main menu to select which drive mode you would like. Single is default. From single, you can select self-timer, which will activate it for your next shot. The drive mode will always reset back to single after every shot so you'll need to set this up for every self-timed shot.

Happy shooting!