diff --git a/HISTORY.rst b/HISTORY.rst
index 6054d4b..e45a874 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -2,6 +2,13 @@
 History
 =======
 
+1.7.8 (2022-08-19)
+------------------
+
+* Fixed missing grid and frame lines of Tie_Point_Grid.plot_shift_distribution() (!27).
+* Remove deprecated sphinx_autodoc_typehints option.
+
+
 1.7.7 (2022-07-21)
 ------------------
 
diff --git a/arosics/CoReg.py b/arosics/CoReg.py
index 9201576..0b4f160 100755
--- a/arosics/CoReg.py
+++ b/arosics/CoReg.py
@@ -123,7 +123,7 @@ def __init__(self,
             with warnings.catch_warnings(record=True) as w:
                 _ = self.footprint_poly  # execute getter
 
-            if len(w) > 0 and 'disjunct polygone(s) outside' in str(w[-1].message):
+            if len(w) > 0 and 'disjunct polygon(s) outside' in str(w[-1].message):
                 warnings.warn('The footprint of the %s contains multiple separate image parts. '
                               'AROSICS will only process the largest image part.' % self.imName)
                 # FIXME use a convex hull as footprint poly
diff --git a/arosics/Tie_Point_Grid.py b/arosics/Tie_Point_Grid.py
index 4d05653..a60e151 100755
--- a/arosics/Tie_Point_Grid.py
+++ b/arosics/Tie_Point_Grid.py
@@ -71,7 +71,7 @@ class Tie_Point_Grid(object):
 
     Spatial shifts are calculated for each point in grid of which the parameters can be adjusted using keyword
     arguments. Shift correction performs a polynomial transformation using te calculated shifts of each point in the
-    grid as GCPs. Thus 'Tie_Point_Grid' can be used to correct for locally varying geometric distortions of the target
+    grid as GCPs. Thus, 'Tie_Point_Grid' can be used to correct for locally varying geometric distortions of the target
     image.
 
     See help(Tie_Point_Grid) for documentation!
@@ -727,12 +727,14 @@ def plot_shift_distribution(self,
 
             # add text box containing RMSE of plotted shifts
             xlim, ylim = ax.get_xlim(), ax.get_ylim()
-            plt.text(xlim[1] - (xlim[1] / 20), -ylim[1] + (ylim[1] / 20),
-                     'RMSE:  %s m / %s px' % (np.round(rmse, 2), np.round(rmse / self.shift.xgsd, 2)),
-                     ha='right', va='bottom', fontsize=fontsize, bbox=dict(facecolor='w', pad=None, alpha=0.8))
+            ax.text(xlim[1] - (xlim[1] / 20), -ylim[1] + (ylim[1] / 20),
+                    'RMSE:  %s m / %s px' % (np.round(rmse, 2), np.round(rmse / self.shift.xgsd, 2)),
+                    ha='right', va='bottom', fontsize=fontsize, bbox=dict(facecolor='w', pad=None, alpha=0.8))
 
             # add grid and increase linewidth of middle line
-            plt.grid()
+            ax.grid(b=True)
+            ax.spines["right"].set_visible(True)
+            ax.spines["top"].set_visible(True)
             xgl = ax.get_xgridlines()
             middle_xgl = xgl[int(np.median(np.array(range(len(xgl)))))]
             middle_xgl.set_linewidth(2)
@@ -746,8 +748,8 @@ def plot_shift_distribution(self,
             ax.set_title(title, fontsize=fontsize)
             [tick.label1.set_fontsize(fontsize) for tick in ax.xaxis.get_major_ticks()]
             [tick.label1.set_fontsize(fontsize) for tick in ax.yaxis.get_major_ticks()]
-            plt.xlabel('x-shift [%s]' % 'meters' if unit == 'm' else 'pixels', fontsize=fontsize)
-            plt.ylabel('y-shift [%s]' % 'meters' if unit == 'm' else 'pixels', fontsize=fontsize)
+            ax.set_xlabel('x-shift [%s]' % 'meters' if unit == 'm' else 'pixels', fontsize=fontsize)
+            ax.set_ylabel('y-shift [%s]' % 'meters' if unit == 'm' else 'pixels', fontsize=fontsize)
 
             # add legend with labels in the right order
             handles, labels = ax.get_legend_handles_labels()
@@ -755,7 +757,7 @@ def plot_shift_distribution(self,
             leg.get_frame().set_edgecolor('black')
 
             # remove white space around the figure
-            plt.subplots_adjust(top=.94, bottom=.06, right=.96, left=.09)
+            fig.subplots_adjust(top=.94, bottom=.06, right=.96, left=.09)
 
             if savefigPath:
                 fig.savefig(savefigPath, dpi=savefigDPI, pad_inches=0.3, bbox_inches='tight')
diff --git a/arosics/version.py b/arosics/version.py
index 70148f8..7a1bbcf 100644
--- a/arosics/version.py
+++ b/arosics/version.py
@@ -24,5 +24,5 @@
 # limitations under the License.
 
 
-__version__ = '1.7.7'
-__versionalias__ = '2022-07-21_01'
+__version__ = '1.7.8'
+__versionalias__ = '2022-08-19_01'
diff --git a/docs/conf.py b/docs/conf.py
index cb8191a..096226e 100755
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -159,8 +159,7 @@ def setup(app):
     'sticky_navigation': True,
     'navigation_depth': 4,
     'includehidden': True,
-    'titles_only': False,
-    'set_type_checking_flag': True  # option of sphinx_autodoc_typehints extension
+    'titles_only': False
 }
 
 # Add any paths that contain custom themes here, relative to this directory.