I have a simple code to create a pygmt map. However, I am not able to change the fontsize of the Latitude/longitude labels .

The sample code is here.

import pygmt
fig = pygmt.Figure()

grid = pygmt.datasets.load_earth_relief(resolution="20m", region=[50,65,10,25])
pygmt.makecpt(series=[-8000,4000])

fig.grdimage(grid=grid, projection="M15c", frame="a", cmap="geo",dpi=300)
fig.grdcontour(grid=grid,projection="M15c", levels=1000,frame="a")
fig.colorbar(frame=["a1000f100", "x+lDepth/Elevation (m)", "y+lm"], position="g51/6+w13c/0.5c+h")
fig.show()

In my understanding, I did mess around but couldn’t find any solution.