Modify image size for activations?

[leszekmp]

Is there a way to change the png output size for activations? 896 x 896 appears to be the standard, but it's marginal for later-layer visualizations. And if I try to visualize activations for "conv5_block3_1_conv" in ResNet50, I get an image that's 161 x 161, with tiny images for the activations that are impossible to make out any detail on.