semantic-displayor-tooltip-mode

semantic-displayor-tooltip-mode is a variable defined in `complete.el'.
Its value is

standard

Documentation:
Mode for the tooltip inline completion.

Standard: Show only `semantic-displayor-tooltip-initial-max-tags'
number of completions initially. Pressing TAB will show the
extended set.

Quiet: Only show completions when we have narrowed all
possibilities down to a maximum of
`semantic-displayor-tooltip-initial-max-tags' tags. Pressing TAB
multiple times will also show completions.

Verbose: Always show all completions available.

The absolute maximum number of completions for all mode is
determined through `semantic-displayor-tooltip-max-tags'.

You can customize this variable.