<p dir="auto">Tested both with 0.11.1 and recent dev version:</p>
<div class="highlight highlight-source-python notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import matplotlib.pyplot as plt
import seaborn as sns

def show_counts(color, data):
    ax = plt.gca()
    ax.text(0.5, 0.95, f'Count: {len(data)}', ha='center', color=color, transform=ax.transAxes)

penguins = sns.load_dataset(&quot;penguins&quot;)
g = sns.displot(data=penguins, x=&quot;flipper_length_mm&quot;, y=&quot;bill_length_mm&quot;, col=&quot;species&quot;, height=3)
g.map_dataframe(show_counts)
plt.tight_layout()"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">matplotlib</span>.<span class="pl-s1">pyplot</span> <span class="pl-k">as</span> <span class="pl-s1">plt</span>
<span class="pl-k">import</span> <span class="pl-s1">seaborn</span> <span class="pl-k">as</span> <span class="pl-s1">sns</span>

<span class="pl-k">def</span> <span class="pl-en">show_counts</span>(<span class="pl-s1">color</span>, <span class="pl-s1">data</span>):
    <span class="pl-s1">ax</span> <span class="pl-c1">=</span> <span class="pl-s1">plt</span>.<span class="pl-en">gca</span>()
    <span class="pl-s1">ax</span>.<span class="pl-en">text</span>(<span class="pl-c1">0.5</span>, <span class="pl-c1">0.95</span>, <span class="pl-s">f'Count: <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-en">len</span>(<span class="pl-s1">data</span>)<span class="pl-kos">}</span></span>'</span>, <span class="pl-s1">ha</span><span class="pl-c1">=</span><span class="pl-s">'center'</span>, <span class="pl-s1">color</span><span class="pl-c1">=</span><span class="pl-s1">color</span>, <span class="pl-s1">transform</span><span class="pl-c1">=</span><span class="pl-s1">ax</span>.<span class="pl-s1">transAxes</span>)

<span class="pl-s1">penguins</span> <span class="pl-c1">=</span> <span class="pl-s1">sns</span>.<span class="pl-en">load_dataset</span>(<span class="pl-s">"penguins"</span>)
<span class="pl-s1">g</span> <span class="pl-c1">=</span> <span class="pl-s1">sns</span>.<span class="pl-en">displot</span>(<span class="pl-s1">data</span><span class="pl-c1">=</span><span class="pl-s1">penguins</span>, <span class="pl-s1">x</span><span class="pl-c1">=</span><span class="pl-s">"flipper_length_mm"</span>, <span class="pl-s1">y</span><span class="pl-c1">=</span><span class="pl-s">"bill_length_mm"</span>, <span class="pl-s1">col</span><span class="pl-c1">=</span><span class="pl-s">"species"</span>, <span class="pl-s1">height</span><span class="pl-c1">=</span><span class="pl-c1">3</span>)
<span class="pl-s1">g</span>.<span class="pl-en">map_dataframe</span>(<span class="pl-s1">show_counts</span>)
<span class="pl-s1">plt</span>.<span class="pl-en">tight_layout</span>()</pre></div>
<p dir="auto">Without calling <code class="notranslate">map_dataframe</code> the outer x and y labels are set to the x and y column names used in <code class="notranslate">displot</code>. After calling <code class="notranslate">map_dataframe</code> the labels are empty.</p>
<p dir="auto">(Apart from that, the function <code class="notranslate">g.set_axis_labels()</code> doesn't seem to be documented, although it appears in the <code class="notranslate">displot</code> and <code class="notranslate">FacetGrid</code> examples.)</p>
<p dir="auto">Calling <code class="notranslate">map_dataframe</code> on a facetgrid removes the axis labels. Reproducible example:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/24327668/106336944-435e5380-6290-11eb-9cd6-f3c9e453e5f0.png"><img width="561" alt="Screen Shot 2021-01-30 at 00 13 07" src="https://user-images.githubusercontent.com/24327668/106336944-435e5380-6290-11eb-9cd6-f3c9e453e5f0.png" style="max-width: 100%;"></a></p>
<p dir="auto">what I assume would happen:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/24327668/106336929-3b9eaf00-6290-11eb-8451-6e76e2eefe3c.png"><img width="558" alt="Screen Shot 2021-01-30 at 00 13 02" src="https://user-images.githubusercontent.com/24327668/106336929-3b9eaf00-6290-11eb-8451-6e76e2eefe3c.png" style="max-width: 100%;"></a></p>
<p dir="auto">Code:</p>
<div class="highlight highlight-source-python notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="import seaborn as sns
tips = sns.load_dataset(&quot;tips&quot;)
g = sns.relplot(data=tips, x=&quot;total_bill&quot;, y=&quot;tip&quot;, hue=&quot;day&quot;)
g.map_dataframe(lambda *args, **kwargs: 1)"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">seaborn</span> <span class="pl-k">as</span> <span class="pl-s1">sns</span>
<span class="pl-s1">tips</span> <span class="pl-c1">=</span> <span class="pl-s1">sns</span>.<span class="pl-en">load_dataset</span>(<span class="pl-s">"tips"</span>)
<span class="pl-s1">g</span> <span class="pl-c1">=</span> <span class="pl-s1">sns</span>.<span class="pl-en">relplot</span>(<span class="pl-s1">data</span><span class="pl-c1">=</span><span class="pl-s1">tips</span>, <span class="pl-s1">x</span><span class="pl-c1">=</span><span class="pl-s">"total_bill"</span>, <span class="pl-s1">y</span><span class="pl-c1">=</span><span class="pl-s">"tip"</span>, <span class="pl-s1">hue</span><span class="pl-c1">=</span><span class="pl-s">"day"</span>)
<span class="pl-s1">g</span>.<span class="pl-en">map_dataframe</span>(<span class="pl-k">lambda</span> <span class="pl-c1">*</span><span class="pl-s1">args</span>, <span class="pl-c1">**</span><span class="pl-s1">kwargs</span>: <span class="pl-c1">1</span>)</pre></div>
<p dir="auto">Version: 0.11.1</p>