Bokeh - Plot Tools

When a Bokeh plot is rendered, normally a tool bar appears on the right side of the figure. It contains a default set of tools. First of all, the position of toolbar can be configured by toolbar_location property in figure() function. This property can take one of the following values −

• "above"
• "below"
• "left"
• "right"
• "None"

For example, following statement will cause toolbar to be displayed below the plot −

Fig = figure(toolbar_location = "below")

This toolbar can be configured according to the requirement by adding required from various tools defined in bokeh.models module. For example −

Fig.add_tools(WheelZoomTool())

The tools can be classified under following categories −

• Pan/Drag Tools
• Click/Tap Tools
• Scroll/Pinch Tools

Tool	Description	Icon
BoxSelectTool Name : 'box_select'	allows the user to define a rectangular selection region by left-dragging a mouse
LassoSelectTool name: 'lasso_select	allows the user to define an arbitrary region for selection by left-dragging a mouse
PanTool name: 'pan', 'xpan', 'ypan',	allows the user to pan the plot by left-dragging a mouse
TapTool name: 'tap	allows the user to select at single points by clicking a left mouse button
WheelZoomTool name: 'wheel_zoom', 'xwheel_zoom', 'ywheel_zoom'	zoom the plot in and out, centered on the current mouse location.
WheelPanTool name: 'xwheel_pan', 'ywheel_pan'	translate the plot window along the specified dimension without changing the window’s aspect ratio.
ResetTool name: 'reset'	restores the plot ranges to their original values.
SaveTool name: 'save'	allows the user to save a PNG image of the plot.
ZoomInTool name: 'zoom_in', 'xzoom_in', 'yzoom_in'	The zoom-in tool will increase the zoom of the plot in x, y or both coordinates
ZoomOutTool name: 'zoom_out', 'xzoom_out', 'yzoom_out'	The zoom-out tool will decrease the zoom of the plot in x, y or both coordinates
CrosshairTool name: 'crosshair'	draws a crosshair annotation over the plot, centered on the current mouse position.