1. Box float float
Float property:
The default is none, which is positioned according to the standard stream;
Left: left suspension;
Right: right suspension;
2. Use clear to clear the floating effect
Clear property:
The default is none, which allows floating objects on both sides;
Left: Disallow floating objects on the left
Right: Do not allow floating objects on the right
Both: floating objects are not allowed
3. Box positioning position
Position property:
The default is static, which is positioned according to the standard stream;
Relative: Relative positioning, offset the specified distance from the original standard position;
Absolute: Absolute positioning, offset based on its containing box;
Fixed: fixed positioning, based on the browser window for positioning;
4. z-index spatial position
Z-index space position, the default is 0, the page with a large z-index value is located above its small value;
5. Box display property
Display：
Inline: Turn the element into an inline element;
Block: Turn the element into a block-level element;