cmd+1,cmd+2,cmd+3 etc to move to other 

alt+cmd+1 to one window
alt+cmd+2 to two vertically split windows
alt+cmd+3 to three vertically split windows

shift+alt+cmd+2 to window
shift+alt+cmd+2 to two vertically split windows
shift+alt+cmd+3 to three vertically split windows

ctl+1 to focus to group 1
ctl+2 to focus to group 2

body
{
    background-color:yellow;
}
h1
{
    background-color:#00ff00;
}
p
{
    background-color:rgb(255,0,255);
}

background-repeat:repeat-y;
/*
repeat
repeat-x
no-repeat
*/

background-size: 80px 60px;

background-position:center; 
/* left top
left center
left bottom
right top
right center
right bottom
center top
center center
center bottom
x% y%
*/

<h1>My Great Website Name</h1>

h1{
    background: url(img/mylogo.jpg) no-repeat;
    text-indent: -9999px;
    width: 400px;
    height: 150px;
}

<h1>My Website Name</h1>

h1{
    font-size: 120px;
    text-align: center;
    margin-top: 50px;
    font-family: san-serif; 
    /* helvetica, arial, sans-serif, cursive
    But the user may not have the same font as you have.
    */
}

h1{
    letter-spacing: -5px; /* 10px */
    color:#666; /* same as #666666 */
    text-transform: uppercase; /* lowercase */
}

p{
    letter-spacing: -5px; /* looks aweful */ 
}

h1{
    text-shadow: 5px 10px 10px #292929;/* 0 1px 0 black very subtle */
    /* x-offset(position, negative is ok) y-offset blur(distance) color*/
}

body{
    background: #666;
}
h1{
    color:#666;/* or black */
    text-shadow: 0 1px 0 white;/* for glow up use 0 -1px 0 white */
}

text-shadow: 
    5px -1px 0 white
    6px -2px 0 red;/* 1px more than the previous*/