look help nanual in shell and you see :
zenity --help-all
Usage:
zenity [OPTION…]
Help Options:
-h, --help Show help options
--help-all Show all help options
--help-general Show general options
--help-calendar Show calendar options
--help-entry Show text entry options
--help-error Show error options
--help-info Show info options
--help-file-selection Show file selection options
--help-list Show list options
--help-notification Show notification icon options
--help-progress Show progress options
--help-question Show question options
--help-warning Show warning options
--help-scale Show scale options
--help-text-info Show text information options
--help-color-selection Show color selection options
--help-password Show password dialog options
--help-forms Show forms dialog options
--help-misc Show miscellaneous options
--help-gtk Show GTK+ Options
General options
--title=TITLE Set the dialog title
--window-icon=ICONPATH Set the window icon
--width=WIDTH Set the width
--height=HEIGHT Set the height
--timeout=TIMEOUT Set dialog timeout in seconds
--ok-label=TEXT Set the label of the OK button
--cancel-label=TEXT Set the label of the Cancel button
--extra-button=TEXT Add an extra button
--modal Set the modal hint
--attach=WINDOW Set the parent window to attach to
Calendar options
--text=TEXT Set the dialog text
--day=DAY Set the calendar day
--month=MONTH Set the calendar month
--year=YEAR Set the calendar year
--date-format=PATTERN Set the format for the returned date
Text entry options
--text=TEXT Set the dialog text
--entry-text=TEXT Set the entry text
--hide-text Hide the entry text
Error options
--text=TEXT Set the dialog text
--icon-name=ICON-NAME Set the dialog icon
--no-wrap Do not enable text wrapping
--no-markup Do not enable Pango markup
--ellipsize Enable ellipsizing in the dialog text. This fixes the high window size with long texts
Info options
--text=TEXT Set the dialog text
--icon-name=ICON-NAME Set the dialog icon
--no-wrap Do not enable text wrapping
--no-markup Do not enable Pango markup
--ellipsize Enable ellipsizing in the dialog text. This fixes the high window size with long texts
File selection options
--filename=FILENAME Set the filename
--multiple Allow multiple files to be selected
--directory Activate directory-only selection
--save Activate save mode
--separator=SEPARATOR Set output separator character
--confirm-overwrite Confirm file selection if filename already exists
--file-filter=NAME | PATTERN1 PATTERN2 ... Set a filename filter
List options
--text=TEXT Set the dialog text
--column=COLUMN Set the column header
--checklist Use check boxes for the first column
--radiolist Use radio buttons for the first column
--imagelist Use an image for the first column
--separator=SEPARATOR Set output separator character
--multiple Allow multiple rows to be selected
--editable Allow changes to text
--print-column=NUMBER Print a specific column (Default is 1. 'ALL' can be used to print all columns)
--hide-column=NUMBER Hide a specific column
--hide-header Hide the column headers
--mid-search Change list default search function searching for text in the middle, not on the beginning
Notification icon options
--text=TEXT Set the notification text
--listen Listen for commands on stdin
--hint=TEXT Set the notification hints
Progress options
--text=TEXT Set the dialog text
--percentage=PERCENTAGE Set initial percentage
--pulsate Pulsate progress bar
--auto-close Dismiss the dialog when 100% has been reached
--auto-kill Kill parent process if Cancel button is pressed
--no-cancel Hide Cancel button
--time-remaining Estimate when progress will reach 100%
Question options
--text=TEXT Set the dialog text
--icon-name=ICON-NAME Set the dialog icon
--no-wrap Do not enable text wrapping
--no-markup Do not enable Pango markup
--default-cancel Give Cancel button focus by default
--ellipsize Enable ellipsizing in the dialog text. This fixes the high window size with long texts
--switch Suppress OK and Cancel buttons
Warning options
--text=TEXT Set the dialog text
--icon-name=ICON-NAME Set the dialog icon
--no-wrap Do not enable text wrapping
--no-markup Do not enable Pango markup
--ellipsize Enable ellipsizing in the dialog text. This fixes the high window size with long texts
Scale options
--text=TEXT Set the dialog text
--value=VALUE Set initial value
--min-value=VALUE Set minimum value
--max-value=VALUE Set maximum value
--step=VALUE Set step size
--print-partial Print partial values
--hide-value Hide value
Text information options
--filename=FILENAME Open file
--editable Allow changes to text
--font=TEXT Set the text font
--checkbox=TEXT Enable an I read and agree checkbox
--html Enable HTML support
--no-interaction Do not enable user interaction with the WebView. Only works if you use --html option
--url=URL Set an URL instead of a file. Only works if you use --html option
--auto-scroll Auto scroll the text to the end. Only when text is captured from stdin
Color selection options
--color=VALUE Set the color
--show-palette Show the palette
Password dialog options
--username Display the username option
Forms dialog options
--add-entry=Field name Add a new Entry in forms dialog
--add-password=Field name Add a new Password Entry in forms dialog
--add-calendar=Calendar field name Add a new Calendar in forms dialog
--add-list=List field and header name Add a new List in forms dialog
--list-values=List of values separated by | List of values for List
--column-values=List of values separated by | List of values for columns
--add-combo=Combo box field name Add a new combo box in forms dialog
--combo-values=List of values separated by | List of values for combo box
--show-header Show the columns header
--text=TEXT Set the dialog text
--separator=SEPARATOR Set output separator character
--forms-date-format=PATTERN Set the format for the returned date
Miscellaneous options
--about About zenity
--version Print version
GTK+ Options
--class=CLASS Program class as used by the window manager
--name=NAME Program name as used by the window manager
--gdk-debug=FLAGS GDK debugging flags to set
--gdk-no-debug=FLAGS GDK debugging flags to unset
--gtk-module=MODULES Load additional GTK+ modules
--g-fatal-warnings Make all warnings fatal
--gtk-debug=FLAGS GTK+ debugging flags to set
--gtk-no-debug=FLAGS GTK+ debugging flags to unset
Application Options:
--calendar Display calendar dialog
--entry Display text entry dialog
--error Display error dialog
--info Display info dialog
--file-selection Display file selection dialog
--list Display list dialog
--notification Display notification
--progress Display progress indication dialog
--question Display question dialog
--warning Display warning dialog
--scale Display scale dialog
--text-info Display text information dialog
--color-selection Display color selection dialog
--password Display password dialog
--forms Display forms dialog
--display=DISPLAY X display to use
zenity --help-all
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