diff --git a/docs/examples/emulator/plot_scalargasp.py b/docs/examples/emulator/plot_scalargasp.py
index a9baa354a95e8040d9f3a951c7bd235412e16c55..54a5cbdcca7b28807d5ed86a323255f3c22747c6 100644
--- a/docs/examples/emulator/plot_scalargasp.py
+++ b/docs/examples/emulator/plot_scalargasp.py
@@ -100,6 +100,7 @@ plt.tight_layout()
 nsamples = 5
 samples = emulator.sample(testing_input, nsamples=nsamples)
 
+# sphinx_gallery_thumbnail_number = 3
 for i in range(nsamples):
     plt.plot(testing_input, samples[:,i], '--', label=f'sample{i+1}')