Hi Alessandro,

For for font sizes, you first need to add the command (which you've possibly already done:

<command>
    <umbracoAlias>mcefontsizeselect</umbracoAlias>
    <icon>images/editor/fontsizeselect.gif</icon>
    <tinyMceCommand value="" userInterface="true" frontendCommand="fontsizeselect">fontsizeselect</tinyMceCommand>
    <priority>76</priority>
</command>

Secondly, you can change the options by adding a custom config key:

<config key="fontsize_formats">8px 10px 36px</config>

Spaces count as a separator so don't add any extra whitespace. The only thing I'm not sure of with this is how to set a default text - when I do this 12pt is shown as the default. Probably not a massive issue but little annoying, nonetheless.

For font family, add a command:

<command>
    <umbracoAlias>mcefontselect</umbracoAlias>
    <icon>images/editor/fontselect.gif</icon>
    <tinyMceCommand value="" userInterface="true" frontendCommand="fontselect">fontselect</tinyMceCommand>
    <priority>77</priority>
</command>

Then add a custom config like so:

<config key="font_formats">Arial=arial,helvetica,sans-serif;Helvetica=helvetica;</config>

Each value should be in the format FONTNAME=VALUE seperated by a ;.

And finally, for the color picker - you can change the default values by adding something like this:

<config key="textcolor_map">
    [
    "000000", "Black",
    "993300", "Burnt orange",
    "333300", "Dark olive"
    ]
</config>