Move the splitter separator. Separator position is stored in a cookie variable.
On page reload the splitter separator gets its position from the cookie variable.

You can set how many days to keep it available.

CookieDays = 10

CookieDays = 0

Click here to reload the page.

First splitter will keep its previous separator position for 10 days.
Second splitter will take its separator position from the component default value.

The feature also works in horizontal splitter.

Example code

    <obspl:Splitter CookieDays="10" id="spl1" runat="server" StyleFolder="styles/default">
                ... Left Panel content here ...

spl1.CookieDays = 10

spl1.CookieDays = 10;