您可以修改matplotlib文档中提供的示例，以添加一个按钮，该按钮在一个新窗口中创建一个图形，其中只有文本。而且，一旦你再次点击相同的按钮，它关闭窗口。
参见下面的代码，我将实现的工具/按钮称为“Info”：

import matplotlib.pyplot as plt
from matplotlib.backend_tools import ToolBase, ToolToggleBase

plt.rcParams['toolbar'] = 'toolmanager'

class ListTools(ToolBase):
    """List all the tools controlled by the `ToolManager`."""
    default_keymap = 'm'  # keyboard shortcut
    description = 'List Tools'

    def trigger(self, *args, **kwargs):
        print('_' * 80)
        fmt_tool = "{:12} {:45} {}".format
        print(fmt_tool('Name (id)', 'Tool description', 'Keymap'))
        print('-' * 80)
        tools = self.toolmanager.tools
        for name in sorted(tools):
            if not tools[name].description:
                continue
            keys = ', '.join(sorted(self.toolmanager.get_tool_keymap(name)))
            print(fmt_tool(name, tools[name].description, keys))
        print('_' * 80)
        fmt_active_toggle = "{0!s:12} {1!s:45}".format
        print("Active Toggle tools")
        print(fmt_active_toggle("Group", "Active"))
        print('-' * 80)
        for group, active in self.toolmanager.active_toggle.items():
            print(fmt_active_toggle(group, active))

class GroupHideTool(ToolToggleBase):
    """Show lines with a given gid."""
    default_keymap = 'S'
    description = 'Show by gid'
    default_toggled = True
    
    def __init__(self, *args, gid, **kwargs):
        self.gid = gid
        super().__init__(*args, **kwargs)

    def enable(self, *args):
        self.set_lines_visibility(True)

    def disable(self, *args):
        self.set_lines_visibility(False)

    def set_lines_visibility(self, state):
        for ax in self.figure.get_axes():
            for line in ax.get_lines():
                if line.get_gid() == self.gid:
                    line.set_visible(state)
        self.figure.canvas.draw()

class ShowInfoTool(ToolToggleBase):
    """Show lines with a given gid."""
    default_keymap = 'I'
    description = 'Show info'
    default_toggled = False

    def __init__(self,*args,**kwargs):
        super().__init__(*args, **kwargs)

    def enable(self,*args):
        fig=plt.figure()
        plt.box(False)
        plt.xticks([])
        plt.yticks([])
        
        plt.text(0.5,0.5,'Sed ut perspiciatis, unde omnis iste natus error\n sit voluptatem accusantium doloremque laudantium, totam rem aperiam\n eaque ipsa, quae ab illo inventore veritatis et quasi\n architecto beatae vitae dicta sunt, explicabo.' ,fontsize=10,ha='center',va='center')
        plt.show()

    def disable(self, *args):
        plt.close()

fig=plt.figure()
plt.plot([1, 2, 3], gid='mygroup')
plt.plot([2, 3, 4], gid='unknown')
plt.plot([3, 2, 1], gid='mygroup')

# Add the custom tools that we created
fig.canvas.manager.toolmanager.add_tool('List', ListTools)
fig.canvas.manager.toolmanager.add_tool('Show', GroupHideTool, gid='mygroup')
fig.canvas.manager.toolmanager.add_tool('Info', ShowInfoTool)

# Add an existing tool to new group `foo`.
# It can be added as many times as we want
fig.canvas.manager.toolbar.add_tool('zoom', 'foo')

# Remove the forward button
fig.canvas.manager.toolmanager.remove_tool('forward')

# To add a custom tool to the toolbar at specific location inside
# the navigation group
fig.canvas.manager.toolbar.add_tool('Show', 'navigation', 1)
fig.canvas.manager.toolbar.add_tool('Info', 'navigation', 2)

plt.show()