我试图调整子绘图上Y轴标签的位置。我试图使其在Y轴上居中，但我不知道如何操作，例如，我的子绘图如下所示：

import matplotlib.pyplot as plt
from numpy import random

    sizes=22
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 1)
    plt.plot(x1, color='red')
    plt.plot(x2, color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    plt.title("Plot 1", fontsize=sizes)
    plt.ylabel('Y-Axis', fontsize=sizes)
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 2)
    plt.plot(x1, label="class 1", color='red')
    plt.plot(x2, label="class 2", color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    leg = pp.legend(loc='lower center',fontsize=sizes, bbox_to_anchor=[0.5, 1.25], ncol=2)
    plt.title("Plot 2", fontsize=sizes)
    
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 3)
    plt.plot(x1, color='red')
    plt.plot(x2, color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    plt.title("Plot 3", fontsize=sizes)
    
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 4)
    plt.plot(x1, color='red')
    plt.plot(x2, color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    plt.title("Plot 4", fontsize=sizes)
    
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 5)
    plt.plot(x1, color='red')
    plt.plot(x2, color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    plt.title("Plot 5", fontsize=sizes)
    plt.xlabel('X-Axis', fontsize=sizes)
    
    
    x1 = random.randint(2000, size=(125))
    x2 = random.randint(1000, size=(125))
    plt.subplot(2, 3, 6)
    plt.plot(x1, color='red')
    plt.plot(x2, color='blue')
    plt.yticks(fontsize=sizes)
    plt.xticks(fontsize=sizes)
    plt.title("Plot 6", fontsize=sizes)
    
    plt.rcParams['figure.figsize'] = (18, 14)
    plt.tight_layout()
    plt.show()

我想将其向下移动一点，使其完全位于Y轴的中心