Customize toolbar

Available in version 3.6 or later.

You can add buttons to a toolbar using Shortcuts advanced setting.

To customize toolbar:

use Settings / Advanced Options... menu (or Ctrl + K Command Palette, type adv to narrow down and select Advanced Options... command)
this opens default .txt editor with advanced settings file
find Shortcuts array and add new shortcut definitions

Example of customization:

Shortcuts [
    [
        Cmd = CmdPrevTab
        ToolbarText = Prev Tab
    ]
    [
        Cmd = CmdNextTab
        ToolbarText = Next Tab
    ]
    [
        Name = Send By Mail
        Cmd = CmdSendByEmail
        Key = Shift + M
        ToolbarText = ✉
    ]
    [
        Cmd = CmdNavigateBack
        ToolbarText = ←
    ]
    [
        Cmd = CmdNavigateForward
        ToolbarText = →
    ]
]

Explanation:

CmdNextTab is one of the commands
Next Tab will be shown in the toolbar

If you provide Name, it’ll be available in Command Palette.

See customizing shortcuts for more complete docs on Shortcuts advanced setting.

Using icons #

Ideally we would allow SVG icons but that’s not easy to implement.

Instead, you can use Unicode symbols supported by Windows’ Segoe UI font: http://zuga.net/articles/unicode-all-characters-supported-by-the-font-segoe-ui/

To find a symbol you can search for example for arrow and then copy & paste the symbol (e.g. →) into settings file.

SumatraPDF documentation

Customize toolbar