How to change font size of chart title and axis title ?

[metulburr]

IT appears you have to integrate this into your code

from openpyxl.chart.text import RichText
from openpyxl.drawing.text import Paragraph, ParagraphProperties, CharacterProperties, Font    

font_test = Font(typeface='Calibri')
cp = CharacterProperties(latin=font_test, sz=1500)
chart.x_axis.txPr = RichText(p=[Paragraph(pPr=ParagraphProperties(defRPr=cp), endParaRPr=cp)])