Disable coordinate label

Hello,
I want to disable the label/coordinate but still keep the frame.
Can you give me a suggestion with following code,

grid = pygmt.datasets.load_earth_relief(
    resolution="30s", region=[122, 123.5, -8.8, -8], registration="gridline"
)
fig = pygmt.Figure()
fig.grdimage(grid=grid, projection="M15c", frame=True, cmap="oleron")
fig.colorbar(frame=["a1000", "x+lElevation", "y+lm"])
fig.show()

I solved the problem using frame=“f”

Am not a pygmt user, but I guess it works the same way GMT CLI does :

a = annotation (automatic)
f = ticks (automatic)
g = gridline (automatic)
a10f5 = annotation every 10 and ticks every 5
and so on…
“True” must mean “afg”

Hi @arapks ,

to extend @PlanetGus list, we have a PyGMT tutorial on adjusting the map frame at Frames, ticks, titles, and labels — PyGMT.