Change font in figures

Dear experts, How can I change the fonts in the figures? for example I want to show the words ''dip1'' and ''dip 2'' bigger than illustrated below:
EEG_3D_Simulation_CortexEEG_Simulated_signals_02_sLORETA_EEG_Constr_2018_03.tif (539.7 KB)


From the GUI:
You can right-click on the figure > Figure > Plot edit toolbar, then click on the Arrow tool (edit plot), click then right-click on the element you want to modify.

Programmatically, for example:

hText = findobj(gcf, 'Type', 'Text');
set(hText(1), 'FontSize', 20)
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